1. What is the material of the Bicycle helmet?

Bicycle helmets are usually made in the following materials:

1. Plastic:Plastic materials are light and durable, sobikeOne of the main materials for helmet production.Polycarbonate (PC) is one of the commonly used plastic materials. It has excellent impact resistance and can protect the rider's head from collision damage.

2. Bubble:bikeThe foam material in the helmet is mainly used to buffer and absorb collisions, reducing damage to the head of the cyclist.There are many types of foam, including polystyrene (EPS), polyurethane and polypropylene.

3. Cellulose:CellulosebikeThe helmet uses carbon fiber, glass fiber and other materials, which can provide higher strength and stiffness, which is lighter and high -grade than plastic helmet.

4, metal:somebikeThe helmet is made of metal, such as aluminum alloy and titanium alloy to provide higher strength and rigidity, but it is generally heavy.

bikeThe material of the helmet needs to have the characteristics of lightness, solidity, durability, and can effectively absorb and dissipate the collision power to protect the safety of the rider's head.

2. What is the role of a Bicycle helmet

1. Protect head safety

Wearing a helmet is the most basic means to ensure the safety of cycling, because the head is the most vulnerable part.The general Bicycle helmet is made of high -intensity materials, which can effectively disperse the impact of fragments such as rocks, earth and stones, and snowflakes to avoid severe damage to the head.

2,Reduce wind and noise

In some occasions, riding requires a higher speed, and its own breathing or wind sound will cause greater interference.Wearing a helmet can isolate a certain wind and other noise to create a more comfortable environment for your cycling.

3. Keep body temperature

In winter, wearing a helmet will play a warm role, promote the maintenance of body temperature, and make the experience during cycling more comfortable.

In short, wearing a helmet is the basis for ensuring the safety and health of cycling.Whether it is ride or occasionally ride, we should develop a good habit of wearing helmets, so that safety has become the bottom line of our cycling.

1. What types of road Lights are

1Divided by the height of the street lights: high rod street lights, middle rod Lights, street lights, courtyard Lights, lawn Lights.

2Divided by street lights: hot -dip galvanized iron street lights, hot -dip galvanized steel street lights and stainless steel street lights.

3Divided by the street light source: sodium light street lights,ledStreet lamps, energy -saving street lights, new type of Summing street lights.

4Divided by styling: Chinese Lights, antique Lights, Landscape lights, single -arm street lights, arms street lights.

5Divided by power supply: city circuit lamps and Solar street lights and complementary scenery street lights.

There are many types of street lamps. Different lighting technologies are suitable for different needs. The fundamental purpose is to design a high -efficiency electronic energy -saving street light with long life, low power consumption, high power factor, and small current harmonic content.

2. What is good for street lights

The street lighting is generally used for high -pressure sodium lamps,Metal halide lamp is also a common source of street lights.From the perspective of lighting, incandescent lamps are the best, but the light flux is low and the light effect is poor.fluorescent lampThe same is the fluorescent lamp. The light emitting principle depends on the gas electrical ionization to stimulate fluorescent powder to light up. Its color rendering is low, but the light flux and the light effect are much better than the incandescent lamp. The neon Lights are almost no other benefits except for good -looking.Extremely low, you cannot do special lighting Lights; the performance of metal halide lamps is very good, especially its power can be made very much than other lamps; LED lights are highly efficient and energy -saving and environmentally friendly, but there are certain certainty.Technical defects.Therefore, in general, it is more appropriate to use metal halide lamps or LED street lights now.

What is the difference between street lights and Landscape lights

1Different height

The difference between street lights and Landscape lights is mainly reflected in the height. The conventional height of street lights is6-12Mi, there are also some routine heights of some street lights are6-20rice.But the general height of Landscape lights is3-6Mi, this is because Landscape lights are ornamental. You do nt need to do too high. The higher the materials you need, the more expensive the cost.

2Different lighting power

Because the street lights are to provide sufficient illuminance, their lighting power is generally large, generally in250-400WWithin the range, the specific power is considered according to the width of the road, the surrounding trees, the height of the light rod, and whether it affects the surrounding residents.

Landscape lights are relatively small, generally80-150WIt may also be smaller, because the landscape lamp has a basic lighting effect. Its biggest effect is to provide strong ornamental. Its light source power can reflect the overall shape of the lamp.Too bright.

3Different applications

street lights are generally used in the main roads, secondary roads, urban squares, communities and other places in cities or villages. lighting needs are generally relatively large.

Landscape lights are generally installed in independent areas, such as parks, gardens, high -end communities, commercial pedestrian streets and leisure squares. Landscape lights are also used in many tourist attractions.

4Different functions

The main role of road Lights is lighting, which must be able to provide pedestrians and vehicles with better lighting.But Landscape lights only need basic lighting. The most important thing is viewing, which is used to decorate the surrounding environment and create an atmosphere.

The shape of the street lights is not so diverse, and there are generally several types.But the Landscape lights have a lot of shapes, very casual and unrestrained.It can be customized according to the surrounding environment and special reasons.

On December 15, 2019, the "2019 China Economic Summit Forum and the Seventeenth China Economic Character Annual Conference" jointly organized by the "Economic" magazine, the Global Times, and the China Asian Economic Development Association was held in Beijing.

As a prestigious economic summit, the theme of this conference is "new economy, new development, and new pattern", which aims to tap the typical representatives of China's economic process.Yuyue Group has won the top ten China Economic Leading Enterprise Award for more than 20 years of industry status, innovative achievements, and economic contributions.

In 2019, the 70th anniversary of the founding of New China, Yuyue Medical has always stood on the front line of the great process of China's economy, and made a basic contribution to the operation of the huge gear of China's economy with technological research and development and model innovation.

Based on the in -depth understanding of the current status and national conditions in China, Yue Yue has continued to cultivate the innovative integration of technology and digitalization in recent years, while completing its own smart medical transformation while working together to jointly build a precise medical ecology.

As of 2019, the products and services of Yuyue Group have successfully covered a number of medical institutions and three hospitals across the country to fully help the implementation of China's hierarchical diagnosis and treatment policies and the transition of medical services.

The vision of Yu Yue in the field of AI medical care is greatly vision to land in the scene and practice.

In July 2019, the first batch of R & D teams of Yuyue Global production bases has settled, which means that the company's exploration of the company's exploration of lean manufacturing logic and production digital systems has achieved a new landing on the ground for many years.

In November 2019, Yuyue Medical passed the national recognition of the National Industrial design Center and the manufacturing single championship, which further enhanced the strength of high -end medical care.

Thanks to the achievements under the global strategy, the group can actively embrace changes in leading and participating in industry technological innovation.

In 2019, Yuyue Group continuously released a number of new domestic medical equipment including atomizer, oxygen -making machine, ventilator, etc. At the same time, the latest generation of AED -full double phase wave automatic except at the MIEDCA conference in November full double phase wave automatic body exceptRibling series M600.In order to more accurately solve clinical medical needs and accelerate import substitutions, the Group has continuously released heavy products such as the ONE Shadow smart Platform, the fourth -generation interventional product King Kong DSA, the cloud glue film scene solution, and I_SPACE1.5T intelligent magnetic resonance.

Relying on Wandong Medical, Parkson Medical, Primedic, Pu Meikang, Shangwei, Likang, Huayu, Jinzhong, Angeli, Jiefu Rou, Zhongyou and other huge brand maps, Yuyue Group successfully covered the entire health industry chainAll Links provide products and services for more than 110 countries and regions around the world from a global perspective.

Based on the advantages of technology and data, Yuyue Group has integrated the four major sectors of clinical medical care, home medical care, Internet medical care and good life.Through the upgrading of technology, the formulation of industry standards, the innovation of business models, and the integration of digital technology, Yuyue Group is constantly developing high -end medical manufacturing and industrial chain upgrades."Value.

1. ChildrenWhat are the Ski jackets

1. Skiper

The technical movements of skiing are mainly done by feet. Children's skiing needs a good pair of Ski boots.Beginners should choose light, flexible, elastic, warm -keeping and waterproof Ski boots. Its room for manipulation is large.It is best to choose low boots with lower boots, so as not to affect the ankle flexion.Generally, according to the shoe code that children usually wear, they must consider a large size when choosing snow shoes, because children still wear thick skiing socks.Let your child try your shoes and then buy it. The toes should not feel too tight in the boots, and be able to move freely.Skiper is different from ordinary shoes and has angles, so when testing shoes, you must stand in a skiing posture.The knee is slightly flexed, and the calves are flattened in the direction of the shoes. Generally speaking, if you feel that the tip of the shoe is about 0 or 5 cm, then these shoes are the most suitable.

2. skiing mirror

The snow is too bright and has a certain impact on vision.Ski mirrors can protect children's delicate eyes from cold wind and ultraviolet rays.Select the Ski mirror that is fully closed and closely fits the child's face.It should be noted that children's nose bridge is generally low, which requires special nasal pads to raise the bridge of the nose to make the snow mirror wears.

It is recommended to choose a double -layer snow -proof and ultraviolet snow lens.The mirror surface is made of colored materials with anti -fog and ultraviolet coating.This material is very soft, and the twisted twisted only deforms without broken, so as to ensure that the mirror surface will not cause damage to the face when it is impacted.

3. Ski helmet

The head is a very fragile part. If you fall at a certain speed when skiing, because inertia will easily reach the head, there is no helmet's protection, the consequences will be unimaginable.Please select a helmet that can cover your ears and buckle skiing glasses straps outside.

4. ski gloves

Children's ski gloves can not only keep warm when skiing, but also protect the hands. When the child falls or collides, gloves can reduce the body's abrasion.ski gloves should be wide, and five fingers should be separated for easy operation.Not only should it keep warm, waterproof, cold, but also soft, wear -resistant, and cut -cut injuries.It's best to have a small dark bag on the back of the hand, which can put the small card in and out of the snow field

5. Protect your face

When skiing, the wind cuts the face like a knife, and puts on the face to block the wind.

2. How to buy children's ski clothes

1. Pay attention to the purchase of children's skiwear. Pay attention to the style: conjoined and split style.The conjoined body is relatively loose, and it is easy to wear and take off. The waist does not leak wind. It is not easy to drill into the clothes in the snow.Most adult skiers believe that wearing skiwear is convenient to slide when skiing clothing.Children's skiing clothes are more suitable for the baby to go to the toilet by themselves, but it is slightly worse in warmth.If you want to choose the style of the split body, you can choose a wind -proof snow -proof skirt design, which will increase the warmth of the clothes to a certain extent.Even if it fell, Xue was not easy to run into the clothes.In addition, you can choose a strap pants style Ski suit.The pants will not fall because of the baby's activities, and it can also protect the baby's small belly.

2. Children are in a state of long body, and the clothes will be replaced quickly.If you have a lot of skiing, you can start a set by yourself. It is recommended to be slightly larger in size 15-20cm, or you choose a style that can adjust the size.In principle, it can be worn until the next winter.

3. If you just take your children to play occasionally, you can rent a set in the ski resort. It does not need to cost more money, but also save time.Before leasing, call the ski resort to confirm whether the leasing service is provided and whether there are corresponding clothes sizes to avoid unsuccessful styles.

4. In terms of color, because the snow field is white at a glance, you must choose a bright color for your child, which is more eye -catching and conducive to taking pictures.When there are many people, it can also play a role in reminding and finding.

5. The waterproofness of skiwear is particularly important. Ordinary children's skiing clothes are generally 5000mm, which is enough to cope with the snow field that the baby can go.However, if children prefer or participate in training classes, it is still recommended to prevent waterproofing, such as 10000mm.

3. National Standards for Children's Ski Service

1. GB-18401-2010 National Textile Products Basic Safety Technical Specifications

(1) Internal quality: The formaldehyde content 20mg/kg, pH value 4.0-7.5, can be disabled to dispel the disabled cancer aromatic amine dye, and cannot have odor.

(2) Dyeing fastness (grade): water resistance (color change, coloring) is 3-4, acid-resistant sweat stains (color change, stained) level 3-4, dry friction level 4, saliva resistance (color change, stained)Level 4.

2. FZ/T81014-2008 "Infant clothing"

(1) The product logo should be indicated that it should not be cleaned.

(2) The collar and hat are not allowed to use the rope band.The length of the rope on the finished product must not exceed 14cm.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;

1. How to tie the line fishing rod

The Taiwan fishing group is composed of hooks, pendants, drifts, lines, ring, etc. according to certain rules. The connection between the fishing rod and the main line is what the Taiwanese fishing fishermen need to know. The method of tie the line fishing rod is:

1. The position of the pole slightly cloth is tied to a knot, and the position of the knot is as close to the front end of the pole. This purpose is that when the pole is slightly accepted, it will not be tangled.

2. Pick up the main line prepared to use, fold the main line into two stocks, one end short -term, and the other end.

3. Use the short line to turn around the two lines to form a small coil, and then pass the short wire head into the small coil, and wrap around the inside of the small coil 5-6 times.

4. After the wrapping is wrapped, one hand holds one hand that needs to be put into the main line of the pole, and the other hand pulls the short -term, and pulls hard until the rope is firm.

5. After the main line knot is tied, install a space bean at the front end of the main line.The role of space Beans is: when the main line and pole are slightly firm, push this time to install the installed space Beans to the main line and the pole to connect the e -commerce slightly, and further strengthen the stability between the main line and the pole slightly.floor insurance.

6. Because when it is introduced into space Beans, space Beans have a certain wear on the main line of the access area, which will affect the slight firmness of the main line and the pole in the future. ThereforeThis wear -wear main line will not affect the slight connection between the main line and the pole.

7. Finally, a double set of the main line and the rod are connected slightly, and the main line is tightened into the pole to push the space Beans to fix.

2. What Fishing lines are good for Taiwan Fishing rods?

When using a Taiwanese fishing rod to fish, in addition to paying attention to the correct tied method of the fish line, the fish wire used should also be paid attention to. So what fish wire is better?

The fish wires used for Table fishing rods are generally commonly used in carbon lines and nylon wires. The advantages of the nylon wire are better ductility, and at the same time, the concealment in the water is also better and the intensity is greater. In addition, the nylon line is better.It is more accurate when drifting.The advantage of the carbon line is that it is more durable and has a longer life.Of course, if you only consider the effect, the nylon wire is recommended.

Third, what color of fish wire do I use?

When the fishing rod uses the fish wire, the color of the fish line is also particular, and the color is very diverse, and the main threads of various colors are sold.

In the color of the fish line used in the table fishing rod, red, yellow, blue, purple and other colors are more common.Red will be absorbed by the water layer when entering the water, so if you choose the main line of red, the fish will not be too sensitive, and the amount of fish that can be dropped will be more.Conversely, fish will be more sensitive to yellow, blue, purple and other colors. Therefore, if you choose lines such as yellow, blue, purple and other colors, the amount of fishing will be less.So the main line of red will be better.