1, cement can not be used beyond the factory period of three months
2. Different types and grades of cement cannot be mixed
3, yellow sand must use river sand, taste with the mouth to know
4. Wall tiles should be soaked in water for more than two hours.
5, wall tiles would rather buy a few more pieces, do not buy less, or prone to color
6. One wall cannot have two rows of non-complete bricks
7. Clean the tiles immediately after wiping
8, the ground paste marble (light color), stone back to do waterproof
9, at the angle of the corner to cut 45 degrees
10, floor tiles to be inclined to the floor drain, otherwise easy to collect water
11, the wall tiles hit the pipe mouth to use the cut form, so it looks like a whole piece of brick
12, ground marble should be dry shop
13, floor tiles must be dirty, non-slip, do not just look good
14, matt tiles difficult to clean
15, the balcony floor tiles should pay attention to the drainage direction
Floor Acceptance Marble Cement Marble Tiles Balcony Tiles
The advantage of the plastic centrifuge tube is that it is transparent or translucent, its hardness is small, and the gradient can be taken out by the puncture method. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life.
Plastic Centrifuge Tubes have caps, which are used to prevent sample leakage, especially when used for radioactive or highly corrosive samples. It is very important to prevent sample leakage; the tube cap also has a function to prevent sample volatilization. And support the centrifuge tube to prevent deformation of the centrifuge tube. When choosing this point, you should also pay attention to check whether the tube cover is tight, and whether it can be tightly covered during the test, so as to achieve the inversion without leakage;
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