What are the types of Swimming goggles

1. By the occasion

At present, the swimming glasses on the market mainly include competitive models (what we usually call "race mirrors) and leisure models.

(1) Athletic Swimming goggles: The swimming mirror of the competitive model is relatively small and the streamlined type is better.

(2) Leisure glasses: There are many varieties of leisure swimming mirrors, and there are many styles, as long as it is suitable for you.In addition, it should be noted that when swimming outdoors, choose a mirror with a deeper color of the lens when swimming outdoors.Prevent dazzling sunlight from hurting the eyes.

2. divide by function

The Swimming goggles are divided into flat, myopia, and old flowers.Generally, when the myopia swimming goggles are selected, the two eyes are divided into the same degree and the different degrees of the two eyes.The price of the two eyes is different due to the processing process of the processing process.When choosing, if there is no suitable degree, it is best to choose a low.The second is the game and ordinary mirrors. The difference is mainly the size of the frame.Ordinary mirrors are generally easy to use, and the frame of the competition mirror is smaller. It will affect the glasses if wearing it for a long time.Therefore, it is best to choose a normal mirror if you Longyou.The third is the non -ultraviolet and non -ultraviolet prevention. The difference is whether it is a diaphragm, but in general, it is best to use a non -increase film at night, because the visual effect will be a bit worse.

myopia goggles

When swimming in the water, patients with myopia cannot bring Contact lenses, because they are prone to breed bacteria, and the eyes are prone to inflammation, which is very unhygienic.Therefore, the appearance of myopia swimming moster is welcomed by the majority of myopia swimming enthusiasts.The appearance of myopia swimming is no different from ordinary swimming moster. It is just a degree of lens in the goggles. It is a Swimming goggles designed for swimming lovers with myopia.Consumers who choose myopia goggles are still different in focus.The young people are more biased towards some goggles with gorgeous, fashionable atmosphere, and highlighting personality.Some middle -aged and elderly people said that they chose myopia swimming moster more to pay more attention to the more practical considerations from the quality and comfort of the Swimming goggles. In terms of color, it is still solemn -in color.

In addition to traditional black, a myopia goggle also has different colors such as blue and brown. It is used to match the colorful Swimsuit to add a lot of fashion, which meets the needs of some consumers to pursue personality.Most of the lens degree of traditional myopia swimming moster is between 150 degrees and 800 degrees, basically as a segment standard every 50 degrees.In 2011, with the birth of the majestic goggles independently developed by the Chinese people, the shortcomings of myopia swimming moster were finally broken.The male goggles can be the same as a segmented standard every 25 degrees, and can accurately match astigmatism.

Old flower swimming mirror

The male goggles are the world's first swimming moster that can accurately match the old flowers. This lens of this swimming moster is exactly the same as ordinary glasses. After the swimmer's degree, including astigmatism processing lenses, install it in a frame with silicone sealing.Inside, it can be close to the original degree of swimming.

What is the role of the swimming moster

1. Because there will be Solar light when swimming, wearing Swimming goggles can resist the ultraviolet rays of sunlight; prevent the glasses from being supplemented by ultraviolet rays, and then improve the clear field of vision;

2. Because the refractive index of water is different from the air, if you swim with a swimming mirror, watching things will be blurred. In order to prevent this, wearing a swimmer will make the swimmers clear;

3. Because the bacteria in the water are relatively many, wearing swimming moster swim can also prevent eye diseases due to bacterial infections, affecting the health of the eyes;

4. For myopia people, wearing myopia goggles during swimming can also help the convenience of swimming. It can also avoid eye damage and make you easier and comfortable when swimming;

5. The goggles will also prevent your eyes from contacting the water when watching things underwater to protect the eyeballs from being irritated.

How to wear a swimming mirror

1. Do not need to wear your head, and directly buckle the Swimming goggles on the eyes.

(The first step is very important. Only the width and frame of the Swimming goggles match your face shape, and you will have suction. Do not leak water during use. If you feel that there is no suction, it means that this swimming moster is not suitable for you.It can be adjusted, and it must be adjusted until there is suction.))

2. When wearing, wear it from the front.

3. When removing, put your thumb into the headband and be lifted from the back.

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Shading coefficient is good or good

The smaller the sunshade coefficient, the better the performance of the sunlight to the indoor radiation.As the state's requirements for building energy conservation are getting higher and higher, as far as the requirements of building glass are concerned, the most important is the Shading (sung) coefficient SC (or SE) and the heat transfer coefficient K value (or U value).The hid coefficient of ordinary glass is about 0.9, so the glass should be processed on the surface, such as thermal reflex glass, low -radiation glass, etc., thereby reducing the shade coefficient.

glass shade coefficient concept description

1. The shade coefficient includes not only the sunlight (300nm-2500nm spectrum) penetrating the glass into the room, but also the energy of the secondary heat transfer of the glass.EssenceThe glass of the glass will absorb the energy of some sunlight, and its own temperature rises. At this time, the glass will be transferred to the room for the second time through radiation and convection.If there is a piece of tea -colored glass, the direct transmission ratio is 50%, and the total transmission ratio of the Solar light is 63%. So 13%of the amount of the glass is the secondary radiation after the glass absorption.

3. The value of the solar energy of the standard 3mm white glass is called the direction ratio, and the value of my country is 0.889, and the international is 0.87. It seems that this difference is not very large, but when it is involved in foreign construction projects involved There should be consensus.Example Calculate the shade coefficient SC = solar energy thermal coefficient (SHGC)/route ratio.When the SHGC is 0.818, the domestic calculation value is 0.92, while the overseas calculation results are 0.94.

3. The sunshade coefficient detects the full spectral energy of the Solar radiation, including ultraviolet light, visible light and near -infrared light in the 300nm ~ 2500nm band. These light shots can produce calories when entering the room.The smaller the sunshade coefficient, the less sunlight entering the room, the smaller the calories that can produce.Low shade coefficient does not directly mean that the visible light transmission rate is also low, because when maintaining the visible light transmission rate, reducing the transmission of near infrared can also reduce the shade coefficient.

4. The shade coefficient is a proportional value of a 3nm transparent glass, which does not mean that the sunlight of the sample glass is always transmitted.For example, when the shade coefficient of the glass is 0.5, it cannot be considered that this piece of glass can enable 50%of Solar radiation heat to enter the room. It should be understood that the Solar calories that the glass can pass through is 50%of the standard 3nm white glass.When the sunshade coefficient of the glass is 1, it means that the total direction ratio of the sunlight of this sample is equal to the standard 3nm white glass.When the shade coefficient is 0, it means that the sample cannot be directly passed through the Solar light through the sun, nor can it be transferred to the solar energy.

5. The heat controlled by the shade coefficient is not the same as the heat control of the heat transfer coefficient. The latter refers to the heat transfer caused by the temperature difference. The former is mainly aimed at Solar radiation.

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What umbrella is a pencil umbrella

Pencil umbrellas are very thin in appearance, and their keel is about the same as pencils, so it is described very well, so the pencil is enough to describe the Slim of the umbrella.The "needle" is too much to describe the pencil umbrella, and the first impression is that it is easy to be bad. Is there anyone else to buy, and you dare not use it when you buy it.

In terms of color, pencils, such as color lead and crayons, are colorful, very fresh and beautiful.For umbrellas, I also want to give people such an impression. The colorful lines are like a box of colored lead. They are full of childlike and cute, making people love.For example, in terms of the color of "needle", there is no such impression in the mind of the human mind. It is cold and glowing. If the first impression is the case, it is estimated that no one wants it.

The size specifications of common pencil umbrellas

[Weight]: About 150 grams.

[Specifications]: 50cm 6K, of which 50cm represents the umbrella surface radius of the pencil umbrella, and 6K represents the number of umbrellas of pencil umbrella.

[Fabric]: High -dense polyester wire woven light color cloth.

[Level]: About 21 cm after folding.

[Diameter]: After folding, the diameter is about 3 cm and open about 94 cm.

precautions for Pen Pen Umbrella Buying

1. When buying a pencil umbrella, you should pay attention to whether there is a curl in the pencil umbrella that tells that this pencil umbrella is anti -UV, that is, this pencil umbrella can really prevent ultraviolet rays (the general umbrella cannot resist ultraviolet rays).Of course, there are dual -use pencil umbrellas with both rain and UVs on the market.Usually, the label will be sewn in the umbrella where the skeleton side is leaned on the inside of the skeleton, or it indicates the anti -UV effect on its price tag.

2. A qualified ultraviolet anti -Shading pencil umbrella, even if the most common fabric is made of high -density process, its cost is at least 10 yuan.The so -called sunshade pencil umbrellas that sell a few yuan are obviously counterfeit products.They only painted a layer of inferior reflex coatings on ordinary umbrella surfaces, and naturally they could not achieve better UV effects.

3. The skeleton of genuine Shading pencil umbrellas is made of steel or aluminum -aluminum materials. Although it is fine but strong and tough; the skeleton of the counterfeit pencil umbrella is made of scrap iron, and it will break after a few times.

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Okay, Shading curtains, okay

The main function of Shading curtains is to use indoor Shading, and at the same time, it has a decorative effect, which is very suitable for home decoration.The Shading curtains can protect the furniture such as flooring, electrical appliances, beds, tables and chairs, and other furniture.Because if you pull the Shading curtains, the people outside will not see the situation in our family.There are many styles of Shading curtains. It is very good to use Shading curtains.

How to choose sunshade curtains

1. Understand the functionality of the cloth

(1) Anti -noise anti -noise

As the seasons warmer, people's outdoor activities increase, and noise outside the window requires the barrier of curtains.If you want a better sound absorption effect, the thicker curtains, the stronger the curtains, the stronger the curtains, such as velvet, cotton, and hemp.

(2)

In summer, the light is strong. In the bedroom, choosing a curtain fabric with strong light can ensure good sleep.In the living room and restaurant, you can choose a thin -quality fabric with good light transmission.

2. Choice of the size of the curtain

The area of the curtains can be able to cover the window to achieve a good shocking effect.The length of the curtain should be dependent on the specific situation of the window.The floor -to -ceiling windows and long -frame windows need to be used to use curtains; windows that are higher than the floor can be used to use the curtain or the curtains of the window sills; the larger window should choose the curtains with wide window holes, so that the talent can achieve the visual balance effectEssenceDue to the diverse of house types and windows of houses, the choice of curtains should be adapted to local conditions.

3. Selection of curtain fabrics

From the material point of view, curtains include cotton, hemp, gauze, satin, velvet, bamboo, artificial fiber, and so on.Cotton and hemp are the most common materials for curtains, which are convenient for washing and replacement, suitable for bedrooms.The yarn curtains have a strong decoration, which can strengthen the depth of the indoor space and have good light transmission. It is generally suitable for use in the living room and balcony.The texture of satin and velvet curtains is very delicate, and it looks luxurious and beautiful. The Shading and sound insulation effect are very good, but the price is relatively high.The texture of the bamboo curtain is clear, the lighting effect is good, and it is very resistant to wear, moisture -proof, and mildew, and it is not easy to fade. It is very suitable to use on the balcony.

4. Choice of the color of curtains

In the living room, it is best to choose a warm -colored curtain to set off the enthusiastic and warm atmosphere.A fresh green curtain can be selected in the study to create a natural, quiet and secluded atmosphere.In the bedroom, you can choose a balanced color to bring a soft, comfortable and idle visual experience.In the dark north room, it is suitable for choosing a neutral and cold -colored curtain; and in the facing room with good light, Hanging chestnut red or yellow curtains can adjust the strong light into soft astigmatism and settle the room in the roomThe gentleness.

5. The curtains are particular

The curtains and patterns should be coordinated with the window size of the room, the age experience of the residents, and the interior decoration and furniture style.If the window is short, try not to choose a horizontal pattern or a small floral pattern, it is best to accept the vertical markings.On small windows, curtains that choose large patterns should be stopped, otherwise the windows will be narrow.The spotted patterns of the curtains should be positive, do not tilt, otherwise it will cause the illusion of the window to tilt.

6. Selection of curtain accessories

Generally speaking, the rich and luxurious European -style Roman curtains often consist of curtains, curtains, and screen curtains. There are many auxiliary materials used in such curtains, and modern curtains can save a lot of auxiliary materials.The amount of orbit is generally the length of the window plus the window cover, plus the length of the 10 cm lock.If there is a curtain and a curtain, you need to use two layers of slide rails.

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[Umbrella Bone] What can I repair the umbrella Bone?

What material is good for the umbrella Bone

With the development of technology.The umbrella has also changed. From the previous oil paper umbrellas to the umbrellas that are now many.With the changes in the umbrella surface, the umbrella Bone has also changed. Most of the previous umbrella bones were wood and bamboo umbrella bones. Later, iron bones, steel bones, aluminum alloy bones (also known as fiber Bone), electric Bone and resinbone.

1 Advantages of aluminum Bone:Light weight and cheap price.

2 The advantages of chemical fiber Bone:Light weight and strong wind resistance.

3 Advantages of carbon fiber Bone:Light weight.Disadvantages: Wind resistance is average, and the price is the most expensive among all materials.

4 Advantage of wood Bone:Traditional Chinese umbrellas are often used.

5 The advantage of iron Bone:Strong and durable, the price is slightly more expensive than aluminum Bone.

How to repair the umbrella Bone

The place where the dark umbrella is easy to break is a small hat on the side. Those small hats are facing the steel skeleton on the inside, because the wind blows the skeleton folding and the hat eyes are loose.In this case, the solution is to find a little thin fabric or plastic, and tighten the hat eye and steel strip together tightly.In this way, umbrellas can be continued.

The skeleton steel bar of the Yulu umbrella is broken. This is also a common situation. When this happens, there will be one or multiple faces when the umbrella is opened.In this case, the solution is to find a pliers. It is best to use a pointed clamping and it will be more convenient, as well as iron wire.Observe carefully and find the iron hat that connects the disadvantages of the connection and replace it with a wire.Tighten it with pliers, and note that the head of the iron wire is screwed with an umbrella to scrape the umbrella surface.

There is also a situation that the position of the contraction card of the Umbrella is broken.After the umbrella is opened, I can't hold it automatically.You can't always push an umbrella with your hands!In this case, it is generally necessary to use a knife such as a fruit knife.The card position when it is opened is flattened, because the total use, as well as the damage of the wind, make the card position uneven and round, and the card can't hold the umbrella.Use a knife to flatten the plastic card position to solve it.The general problems with these methods can be solved.

In addition to the above situations that need to be repaired, the Yellow Umbrella needs to be maintained: the winding wire bending of the umbrella Bone is easy to cause the wire Bone, which can directly pull the iron wire with the hand to avoid the rivet falling off or the umbrella cloth pierced; in the umbrella in the umbrella;The handle is rusty, which is easy to cause the opening and closing. Use a small screw or the toothpick to dip the lubricant to drop the middle handle joint, and then open it several times.The structure is so simple.No matter how big the problem is, there is no need to repair it again.

I believe that after watching the common faults and maintenance of the Yulu umbrella, you can get some maintenance tips.Umbrellas can not only shade the rain, but also shrink and easy to carry.For students, it is the most reliable to prepare an umbrella in a schoolbag.However, after using the umbrella on a rainy day, be sure to remember to dry it before receiving it. In this way, the umbrella handle of the umbrella will not be so easy to rust.Essence