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Anonymous users2024-01-23The ceiling is mainly divided into: light steel keel gypsum board ceiling, gypsum board ceiling, plywood ceiling, special-shaped long aluminum gusset ceiling, square painted aluminum gusset ceiling, stained glass ceiling and so on.
The flat top is a suspended ceiling;
Level 2 is two layers;
Level 3 is the third floor;
The styling is the other inside.
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Anonymous users2024-01-22The first-level ceiling is the ceiling of the first layer under the shed, and the second-level ceiling refers to the basis of the first-level ceilingMake a layer of ceiling below the first-level ceiling.
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Anonymous users2024-01-21It doesn't matter, it depends on how many floors of ceilings there are.
Introduction to the classification of grades:
One. The lock cylinder standard of the security door grade. >>>More
Class A Class B Super B Class C Class Super C.
The security level ABC of the anti-theft door is divided according to the security level of the anti-theft lock. The security level of the anti-theft lock is divided into Class A, Class B and Class C according to national standards. >>>More
This can not keep an eye on the brand, the main thing is to look at the material, if it is solid wood furniture, environmental protection to reach the E0 level is easy. However, if it is furniture made of MDF material, it is best not to look at the environmental protection level of the mark, and it is accurate only if you have tested it yourself.
At present, the lock cylinder level on the market is divided into three levels, and its security level is arranged in order from low to high as A-B-B-super B-level, which level of the lock cylinder can be preliminarily distinguished from the key, the key of the A-level lock cylinder has only one row of cogging on each side, and there are two rows of cogging on both sides of the B-level, the cogging of the super B-level is completely different from the A-level and B-level, the super-B-level lock cylinder is not with a marble, but with a blade, and the key cogging is usually one or more serpentine grooves. As for the C-level that someone said, I haven't heard of it, let alone seen it.