Culture stone 024

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Material: Reef rock stone series

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Q:How to use a simple method to detect whether it is 316 stainless steel sheet
Third-party testing company simply to test the first nickel if there are 10 nickel and then test molybdenum, phosphorus can probably distinguish if you do not want such a trouble to measure a material analysis (all elements, including all the grades to help you analyze)
Q:What kind of furniture are all kinds of furniture ah?
Generally divided into solid wood and man-made sheet. Solid wood is a natural solid wood sheet, this is easy to understand. Man-made sheet is divided into many categories. 1, multi-layer plywood. 2, Blockboard is the big core board. 3, high density board fiberboard (high density board) 4, solid wood particle board. 5, particleboard. 6, moisture board and so on
Q:Furniture board specifications four eight feet What is the meaning of that: 4 * 8
Consistent with the specifications of stainless steel plate, 4 * 8 four eight feet that is 1219mm * 2438mm It is 1 meter 22 * 2m 44
Q:How can we distinguish between good and bad plate quality?
Can be distinguished by the following steps and methods: First is "see", but also to see the focus. Good plate surface smooth and smooth, the edge of the board is very clear. As well as the packaging on the plate is clear, the above name, address, grade, specifications and other information are complete, not clear, incomplete information or more attention to the plate, and may be added to the color of the plate. Two smell, because the legendary formaldehyde is released from the plate, will directly affect people's health. Good plate not only good choice of materials, but also for the adhesive glue is environmentally friendly, even if the number of more stacked together, it will not emit a very pungent taste. If the choice of a plate placed in the home there is a very obvious pungent chemical smell, it should be noted.  Three saws, before the purchase can be a small sample to the business, and then cut it to see its inner core, a good plate section level is very clear, because it is a layer of paste a very tight, very good convergence, and those miscellaneous Wood stitching the poor quality of the plate core is not dense, must not buy. Four test, through the relevant identification agencies, with professional tools and related technical means to identify the plate to determine the quality of good or bad, this method is more professional and accurate. Plate material is also an important factor is the moisture content, the general moisture content of the plate should be less than 16%, if too high that is not good, may be a while will be mildew or deformation.
Q:PCB sheet problem
Only from the picture, it is difficult to judge, such as the picture should be a single panel, the first white substrate may be rogers some models may also be cem-1. The third type may be glass fiber cloth fr-4. In fact, the use of plate to see the nature of the circuit and the use of the environment. For example, there is no special circuit can be used fr-1.fr-4.cem-1 can be. High circuit frequency can be used Rogers series plate, more than 5g frequency should be used ptfe microwave plate.
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:TR-90 cp pc plastic glasses frame difference, as well as what is the material sheet! Physical properties how?
TR90 spectacle frame surface lubrication, the density of 1.14-1.15, on the saline will float, than other plastic glasses frame light, about half of the weight of the plate material, nylon material is 85%, can reduce the bridge of the nose, the burden of the ear, suitable for young people . It is very resistant to wear, good chemical resistance, solvent resistance, weather resistance is good, not easy to burn, high temperature. And it is memory of the polymer material, anti-deformation index 620kg / cm2, not easy to change because TR90 material Eyeglass frame elasticity, toughness, easy to break, strength, no rupture, so it has sports safety. And it is very resistant to impact: more than 2 times the nylon material, ISO180 / IC:> 125kg / m2 elasticity to effectively prevent In the movement due to impact on the eye damage. No chemical residue release, in line with European food-grade materials requirements. TR90 material than other pc, cp and other frames material is much more expensive, and the production process is also more stringent, so TR90 glasses frame price than the other to be several times more expensive. CP: refers to propionic acid frames PC: refers to the plastic frames, made of polycarbonate Material: The material is made of high-tech plastic memory plate. Ingredients: Most of the current sheet metal components are acetate fiber, there are a few high-grade frame is propionic acid fiber, while the acetate fiber sheet is divided into injection molding and pressing Type, injection molding is the name of the mold is made of water, but most of the current is to suppress the processing of sheet metal glasses in terms of the origin of the plate in France and Italy, the plate is better, Japan is also quite good, many high-end sheet glasses Based on these high-quality sheet, and therefore more reliable quality.
Q:What is the tax rebate rate for stainless steel sheet exports?
Stainless steel sheet export tax rebate rate is generally 9 or 13 points, specifically the goods and their exports HS code.
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:Stainless steel industry in the non-standard plate, non-standard What does this mean?
Mainly refers to the content of nickel is not up to the plate. So the quality is poor

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