Q:What is the difference between a sunglasses or a sheet of plastic?

Remove the sunglasses lens quality factors, the greatest impact on the price of sunglasses should be brand value-added and material caused by the different costs. Brand value added here is not discussed, this thing in the selection of sunglasses when the wise, can not tell a right and wrong. Then we talk about the material of the sunglasses frame. Compared to other materials, the use of sheet and plastic sunglasses frame on the surface is not see the difference. First of all, the plate frame is a memory function, if you buy the sunglasses mirror legs for you too tight or too loose, then you can adjust the mirror legs, straighten the bend is not a problem, but also inside and outside the bending Adjustment. If it is a plastic material sunglasses frame, a small adjustment does not work, it will automatically change back to the prototype, if a substantial adjustment - it will not change back to the prototype, because it has been broken ... Secondly, from the details, the frame of the frame to wear more comfortable, the basic will not appear discomfort. The plastic frame in addition to the overall structure is relatively stiff, is not conducive to the adjustment, the external paint may also be processed, there will be irritating smell. Finally, the frame of the frame will have steel (think of reinforced concrete, there are wood), durable. Plastic frame it, in addition to plastic or plastic, can be used to know how long days. So look at the appearance, you can not find the difference between these sunglasses.

Q:Do you know the top of the wardrobe?

The top solid wardrobe is made of high quality plate, special process, moisture resistance, formaldehyde emission meet the E1, E0 environmental standards, with anti-deformation, anti-mildew pest control, anti-acid, anti-scratch, recyclable The use of double-track single pull pulley, the last round of the United States DuPont pu materials, the next round of modified pps material, with wear-resistant, muffler, bearing the strong and so on. With the top of a special top and bottom seal, completely put an end to dust. The top of the wardrobe pulley is the international top of the sliding system, tight seal.

Q:How about a pair of plates?

Shuangyou I saw the online information is a wood company in Zhejiang, but the fame is not king coconut, Moganshan such a large brand of large plates. Influence is also inadequate.

Q:Do the closet with osb board with high density MDF which is better?

Osb board is better. OSB (Oriented Strandboard) board, also known as oriented particleboard, the domestic also called the European pine board. It is a synthetic wood "OSB" source --- "Ou Song board" is the name of the directional structure of particleboard (OrientedStrandBoard, 0SB), is a from Europe, seventies and eighties in the international community to develop a new type of rapid development. "Ou Song board" (also known as "love grid") in the application of the furniture has been an unprecedented development, many large furniture companies are beginning to use "OSB" production of furniture, the reason why consumers like the lack of formaldehyde Release, and durable, and made of medium density fiberboard furniture, light weight, better flatness. High density MDF (HDF) is a kind of sheet made of wood fiber or other plant fiber as raw material, urea urea resin, or other synthetic resin under the conditions of heating and pressing. Smooth, in the ambient temperature and humidity changes, the size of good stability, easy to surface decoration treatment. The internal structure of fine, in particular, has a dense edge, can be processed into a variety of special-shaped edge, and do not have to cover the edge of the direct coating, you can achieve better shape effect. Uniform structure, inside and outside the same, so you can carry out the surface of the carved processing and processing into a variety of sections of the decorative lines, suitable for the replacement of natural wood for structural materials.

Q:The most commonly used gas shielded welding consumables are certainly different from the material being welded. The silicon content and the manganese content in the wire are higher than those in the material. And the sulfur content inside the wire is much lower than the sulfur content of the base material being welded. Here, the role of silicon manganese is in the welding arc, in the welding bath for deoxidation of the chemical reaction, the other silicon manganese infiltration of the base metal can also improve the strength and plastic of the weld metal.

This is a bicker First said that the base material, copper, aluminum, carbon steel, stainless steel, cast iron, titanium ,,,,, Say welding material, ,,,,,,,, The welding method is then discussed Then arrange the combination. Can be welded, divided into a class. Can not be welded, divided into a class.

Q:What kind of PCB need to use Anti-CAF sheet

Anti-CAF is a material with special characteristics! In fact, the ordinary FR4 sheet also has enough of this feature, but in the special areas of the product may require more stringent reliability, so the material supplier was the introduction of such a special plate! Electronic migration is mainly a greater impact on the environment, such as humid environment will exacerbate the risk of electronic migration! From the product structure, such as the spacing between the holes is too small, will also cause greater risk!

Q:Plate fire rating, such as glass magnesium board incombustibility to A1 level, how to distinguish these, how many fire rating?

Classification of fireproof sheet A1 is absolutely nonflammable, without any toxic fumes A2 is not combustible, there is a certain amount of toxic flue gas production (in line with testing standards) B1 flame retardant B2 does not burn B3 flammable Now on the market a small number of A-class fire board, most of them are B-class, we must see this plate of the test report and is the type

Q:What is the HS code of the PVC sheet?

39202017.00 PVC board 39204300.90 recycled PVC board 39204300.90 PVC board 39204300.90 color PVC board 39204300.90 color printing PVC board 39204300.90 PVC PVC board 39204900.90 anti-static PVC board 39219090.00 color PVC board 39261000.00 PVC board clip 39269090.00 PVC board display stand

Q:What is the meaning of furniture material E1MDF?

E1MDF refers to the environmental E1 grade MDF. According to national standards, MDF according to its free formaldehyde content can be divided into E0 level, E1 level, E2 level. E2 grade formaldehyde emission ≤ 5mg / L; E1 grade formaldehyde emission ≤ 1.5mg / L, can Directly used for interior decoration; E0 grade formaldehyde emission ≤ 0.5mg / L. Consumers in the purchase of MDF, should try to buy low-formaldehyde emission of goods, such goods more secure.

Q:Plate frame and TR90 which light a little ah

TR90, is currently the most popular ultra-light frame material. ????Knowledge of universal: now glasses regardless of the brand, the material is varied. A pair of beautiful glasses is not only beautiful appearance, but also need to know when the wearer face and glasses with how to match, so that the more perfect, and glasses will play its role in the modification, make you more attractive. Here to understand what glasses look good. ????Today's sheet glasses can be described as all kinds of people are particularly fond of the work complex and delicate, diverse styles, it is important that the color is good, not allergic, it is not easy to fade, it can be wild, itself is in the high-end frame. Whether it is from their own grades or style design is very advantageous, and many brands of glasses are made of sheet metal, such as by the industry more admired wood ninety glasses, is used to produce high-grade sheet, beautiful appearance , Wearing fashion is also very good. What glasses are good-looking? Each pair of glasses have their own characteristics, have their own bright spots, a reasonable choice, the correct match, after wearing are generally very good. Moreover, the spectacle frame itself is an ornament, plays the role of landscaping. Like the trend of fashion style, recommended wood ninety glasses, or lynx "and Ze joint glasses franchise stores"