1. The difference between the compass and the compass

The compass is also known as Sinan. The main component is a magnetic needle installed on the axis. Under the action of a natural magnetic field, the magnetic needle can be rotated freely and kept on the cut line of the magnetic meridian.Performance can distinguish the direction.Commonly used in navigation, land measurement, travel and military.The invention of the compass in the direction of physical indications consists of three components, which are Sinan, compass, and magnetic needles, all of which belong to the invention of China.

Feng Shui compass, also known as compass, Luo Jing, Luogeng, Luo Jingpan, etc., consisting of Tianchi (compass), Tianxin ten and inner plates. The entire disc can rotate back and forth.Tool.In addition, it also has the effect of blocking evil luck. For families with poor home transportation, they can be placed in the direction of north and south and placed in the financial position of the home or the middle of the living room., Improve Jiayun.

Ancient Chinese compass is divided into coastal and mainland types. The coastal production site is Zhangzhou and Xingning, Fujian, and is used for navigation.The main producing area of the Mainland is Wanan's Feng Shui compass, which is used to determine the orientation and layout of house buildings and tombs.

The ancestors of the compass and the compass are the same. They are all called Sinan. Sinan also has a lot of information. Later, according to the different effects, the guide needle focuses on the direction, and the compass was used by Mr. Feng Shui.The detailed angle is also a kind of compass.

There are more functions of the compass than the compass. The compass can only be used to judge the direction. The compass also has measured inclination and tendency. The compass is developed on the basis of the compass!

Second, Sinan and the compass, who invent first

Sinan was the earliest recorded in the late Warring States Period. The compass was the Southern song Dynasty, so Sinan was earlier.

1. What is the fluffyness of outdoor down jackets

The fluffyness of outdoor down jackets is an important indicator for measuring your warmth. Generally, the fluffy Outdoor down jacket on the market is about 500.High -quality outdoor down jackets can reach 800 to 900. Such outdoor down jackets are usually warmer and the price is relatively high.

The highly fluffy Outdoor down jacket can quickly restore the original shape after being oppressed. Usually within 6 seconds, this characteristic reflects its good elasticity.It is worth noting that the fluffyness of outdoor down jackets is not permanent. As the down jacket is worn, washed and compressed, the fluffyness of the down will gradually reduce the warmth.

Second, the higher the Outdoor down jacket, the higher the higher the more than

The fluffy of outdoor down jackets refers to the size of each ounce (28.35 grams) of the weight of the down, and the unit is cubic inch.If a ounce of heavy down the space is 800 cubic inch, the fluffyness of the down is 800.Therefore, fluffy is a British -made volume value, which represents the capacity of the air volume stored in the down of each unit of down.The down is the physical characteristics of the use of the poor conductor that uses the air that is heat. The higher the fluffyness of the Outdoor down jacket, it means that the down of the down under the same volume can fix the larger the air layer to keep the insulation.EssenceOf course, the higher the fluffyness, the corresponding increase in down the down.

Generally speaking, more than 600 fluffy is a good down, which is also the starting level of Outdoor brand down jackets.If the down jacket is a thick style, it usually uses down the down below 700 fluffy. The technical model that emphasizes the weight and compression ratio often uses the down of 800 fluffy down.It is recommended that you do nt have to pursue high fluffyness. It is good to be more than 600, and look at the specific usage scenarios.

Third, how to look at the fluffyness of outdoor down jackets

The warmth of outdoor down jackets is closely related to its fluffyness. Therefore, how to correctly judge the fluff of down jackets has become one of the important factors to determine whether to buy.Here are several methods to judge outdoor down jackets:

1. View label:existOutdoordown jacketThe tags will indicate the level of fluffyness, such as "500" and "800", the higher the value, which means that the puffed velvet of the down jacket is more fluffy, so it has better warmth performance.

2. Press test:outdoor down jackets are stacked and pressed with palms to see the time when the bullet expansion. The faster recovery, the higher the fluffyness.

3. Compared with weight:At the same volume, outdoor down jackets with high fluffy down jackets are lighter than down jackets lower than fluffy. This is because the fluffy down can provide more warmth effects at a smaller volume, so the amount of down the down is relatively small.

What is the electroplating swimming mirror

The electroplating Swimming goggles refer to the electrochemical method on the surface of the swimming lens lens, and plated the metal material to the upper layer to achieve the purpose of enhancing the performance of the swimmingoscopy lens.According to different metal materials, the electroplating goggles can be divided into silver mirrors, gold mirrors, multi -color mirrors and other types for different occasions and needs.

Is the electroplating mirror harmful?

No harm.The electroplating goggles are coated on the lens, mainly to protect the lens and protect the eyes.The following is the characteristics of the electroplating goggles:

1. UV prevention

The electroplating material can filter out the damage of the sun's ultraviolet rays to the eyes, which can effectively protect the vision.

2. Clear vision

Electroplating materials have good optical performance, avoiding blurring, distortion and other phenomena such as ordinary Swimming goggles.

3. Corrosion resistance

The electroplating material has strong resistance to chlorine contamination and water quality in the swimming pool, and is not vulnerable to corrosion.

4. wear resistance

Electroplating materials can enhance the hardness of the lens, slow down the lens wear, and extend the service life.

Is the electroplating mirror anti -fog?

Electro -plating goggles can effectively prevent fog.The electroplating goggles are usually plated with a layer of film on the inside, and this film contains surfactants.When swimmers wear swimming moster, the water steam will interact with the surface active agent on the film, so as to form a uniform water steam film, making it easier for the water vapor to spread on the surface of the Swimming goggles.

Is there a zone of the electroplating mirror?

have.

At present, there are many types of goggles on the market, which meets the choice and use of different people.The electroplated swimming lens with a number of bands can be selected according to the requirements of the personal degree, which can help myopia patients see the object clearly while swimming in the water.

How to identify the quality of folding beds?

Step/Method

1. Evaluate whether the folding bed/lunch break is firm and whether the bed foot will shake left and right.

2. Evaluate the workmanship of the folding bed/lunch break. There are rough scratches on the surface.

3. Evaluate whether the folding bed/lunch bed is convenient.

4. Look at elasticity.Lie down in person and turn around a few times. The good spring will not be moved or uneven, and it can immediately restore the original shape.

5. Look at stability.You can use both hands to shake and shake the product back, left and right, and sway, and the framework is firmly explained.

6. Pay attention to the quality of the bag.If you buy the leather, you can use the tip of your two fingertips to pull one place and pull it up. The feel is powerful.

7. Look at the craftsmanship.If it is a folding bed of the steel frame structure, it is necessary to pay attention to the Smooth and gap at the welding. The coating looks uniform and soft, and the surface of the steel pipes treated with plastic spraying process is high, more abrasion, and more shiny.And if the paint is used, the surface of the steel pipe is more likely to produce scratches and cause it to oxidize and rust, and there is no gloss.

In order to strengthen the protection of marine fishery resources and promote the harmonious coexistence of man and nature,The agricultural and Rural Ministry issued the "Announcement on Adjusting the Marine Valua Restaurant Resting System" to further adjust and improve the maritime vile -season fishing system.

Bohai Retreat time

Bohai and Yellow Sea, which north latitude 35 degrees north latitudeoffishing timeIt is 12:00 on May 1st to 12:00 on September 1.

fishing operation type

All types of operations other than fishing tools, as well as fishing auxiliary vessels for fishing vessels.