Q:I went to the optical shop to see the frame, the shopkeeper asked me to be good or the general, I said a little better when he took me a pure titanium, and asked the price surprised. I find a pick when he said, he said that the plate, the price is more than 100 I now use the plastic, the frame to buy when only 20 yuan. In the end what kind of frame should be good for it? I hope the price will not exceed 150 yuan

Frames should be based on the face of the selection; face thin with a thin point of the frame is better. But also with the length of time wearing glasses also have to contact every day wearing a long time to choose a light point of the glasses, to avoid the nose pressure change type. In fact, the most important thing is the lens, the quality of things now vary widely, you have to choose a high light, wearable, safe, and their favorite. Also, male and female wear frames are not the same. Pure titanium, high-grade some corrosion-resistant, but also anti-magnetic. Large face of the plate do not use, round face is not appropriate. It is best to wear to see.

Q:TR90 memory board frame is what?

In fact, there is no such frames, TR90 frame with the plate is different. 1, from the material comparison: TR90 frame is the use of nylon material (also known as nylon 12 or PA12), is the most popular ultra-light frame material, with light weight, good toughness, super safety and other characteristics, with super Flexibility, wear in motion will never break. (Except fake and shoddy products). Plate frame is the use of acetate fiber or propionic acid fiber. Injection molding or suppression of grinding production. 2, the process comparison: TR90 frame process complex, the injection of glass factory and spray paint process requirements are relatively high. Plate rack: Although the plate rack less painting, but in the work than the TR90 frame process to be much more, more complex process. 3, the use of comparison: TR90 Frame: light weight, comfortable to wear, more secure, more difficult to deformation. The only drawback is that it will fade. Plate frame: the same size of the frame relative to the TR90 frame will be more weight, the bridge of the nose will have the feeling of oppression, comfort is not as TR90 frame, flexibility and safety than the TR90 frame slightly worse. The advantages of three-dimensional sense of strong, three-dimensional edges and corners of the TR90 frame can not be compared, but also not out of color. )

Q:What kind of wood is the water-based material? Environmental protection?

Water-based days is a professional engaged in water-based polymer research and application of high-tech enterprises. "Water-based technology, beautiful China" for the corporate mission, with the world's first water-based wet synthetic leather production line, China's first 100,000 tons of water-based polyurethane production line and China's first harmful chemical substances testing center. Water-based science days not only to create a new era of non-toxic home improvement, but also to promote water-based materials, furniture, synthetic leather and other areas of green environmental protection industry changes.

Q:Now I have to come up with a E1 level test report, but I want to buy E0 level, but the staff of Loulan Ya said that there is no E0 level of this concept. Is this true? Please industry experts to answer the next

The same is the so-called "E0" level standards, different business theory is a lot of difference, which makes reporters full of doubts. "As the industry, the domestic 'E0' level is actually a concept, the use of plastic sheet metal, it is difficult to achieve 'E0' class standard.

Q:How about Tiantuo plate

How to buy plate (1) whether it is environmentally friendly. According to the provisions of the indoor building materials formaldehyde emission must be less than or equal to 1.5mg / l, if more than 5mg / l is exceeded. (2) wood moisture content. When the wood moisture content is higher than the equilibrium moisture content of the environment, the wood will dry shrink, otherwise it will absorb moisture expansion. The main cause of wood cracking and deformation is that the moisture content is too high or too low. (3) Do not just cheap. Low-priced materials are usually sold and crushed and formaldehyde seriously exceeded the material, should be to the regular market to buy, it is best to buy a brand of materials. (4) the purchase of wood flooring when the tree species do not have to worry about the name, the election is the most important dealer.

Q:Why use office furniture

Common furniture with the plate varieties are: solid wood, fiberboard, particleboard, blockboard, plywood and so on. At present, the manufacture of office furniture is mainly used are: fiberboard and particleboard. Low-grade office furniture generally use particleboard, and medium and high-grade office furniture generally use fibreboard. Fibreboard is divided into high density fiberboard (density> 0.8 / cm3), medium density fiberboard (0.5 g / cm3 ≤ density ≤ 0.8 g / cc), low density fiberboard (density <0.5 Gram per cubic centimeter). High density fiberboard due to high density, difficult processing, and easy to nail, the installation of accessories burst; and low density fiberboard due to low density, large gap between wood fibers, easy to water swelling, resulting in surface cladding off, and even the plate disintegration, so the second The use of office furniture are less. The MDF (medium MDF), with the surface smooth, the internal structure of fine, good processing effect, with strong resistance to deformation and load-bearing capacity, And the plate holding nail ability, can be achieved many times disassembly, as in the high-end office furniture of choice. Sunlong's office furniture is used in the manufacturer's custom-made density of up to 0.76 grams per cubic centimeter of the MDF (generally medium density fiberboard density of 0.64 grams per cubic centimeter or so).

Q:A5052P ー H34 aluminum alloy sheet number and the meaning of what is the letter?

A5052P rust-proof aluminum alloy, chemical composition%: Si Fe Cu Mn Mg Cr Zn 0.25 or less 0.40 or less 0.10 or less 0.10 or less 2.2-2.8 0.15-0.35 0.10 or less. 5052 for the aluminum alloy grades, it is magnesium alloy (5xxx series are magnesium alloy) one of them, can solve the work hardening, strength comparable to steel. The alloy has good forming processability, corrosion resistance, can be candle, fatigue strength and moderate static strength, used in the manufacture of aircraft fuel tanks, tubing, and traffic vehicles, ship sheet metal parts, instruments, street lamps and rivets, Metal products and so on. "-" The subsequent H indicates that the work hardened state is suitable for products that are enhanced by work hardening, and the product can be subjected to an additional heat treatment that is reduced (or may not) after work hardening. Commonly used aluminum 7075 aluminum alloy plate, 7075 aluminum alloy tube, 5052 aluminum alloy wire, 6063 aluminum coil, 2024 aluminum alloy rod, aluminum alloy profile. Product Standards GB / T3880-2006 "general industrial aluminum and aluminum alloy plate, strip" GB 5237-2004 "aluminum alloy construction profiles"

Q:Now a lot of furniture on the market, do not know the solid wood or wood imitation of the wood

First of all, you can distinguish from the pattern, pure solid wood furniture pattern is no change in the law, and paste leather furniture pattern changes are very regular, such as butterfly-like, or words continue to head, and pure solid wood furniture patterns are irregular The second measure is that you can look at the furniture is not used to start the falcons, falcons are solid wood furniture, one of the necessary technology, the so-called falcon, that is, slot, wood and wood convergence is not glue and nails , But rather like a child to play the same building blocks, so that together, this is why the reasons for environmental protection of solid wood furniture, and the layout of the furniture is absolutely impossible to use frying craft third trick, generally better solid wood furniture, in addition to In addition to the structure of the falcon, there should be splicing technology, splicing is divided into two kinds, tooth and then flat, as the name suggests, tooth connection, is the two selected wood, both ends are playing like a tooth-like teeth, and then two pairs Together, this is the tooth connection, if there are teeth of the furniture, take the wardrobe door, the door inside and outside the tooth interface must be on the fourth move, solid wood furniture should generally be round circle The design of the corner, because only the wood, in order to withstand the pressure to cut into a circular, the layout is not possible

Q:What is cold rolled plate ah? Cold rolled plate is a plate of no

Simply put, that is, from the hot-rolled plate through the bell-type furnace or continuous annealing process, into a cold-rolled plate, the actual change is the physical structure of iron atoms, making it easier to bend, punching and other mechanical process The Cold rolled plate is only a basic plate inside the plate, after galvanizing, it becomes a galvanized sheet.