1. The reason for the sound of the drum sound is due to the fact that the fixing is not true, mainly because the number of nails and keels, the board and the floor nails are small or the nails are not strong, and sometimes the shrinkage or the glue is unqualified due to the change of the moisture content of the board. To. Therefore, the process of strictly testing the moisture content of the board, the quality of the adhesive, etc. is particularly important. It can only be used after passing the test. The nail should not be too small during installation.
2. The main cause of uneven surface is the unevenness of the base layer or the deformation of the floor strip. During the construction, apply the level to level the surface of the keel, if it is not flat, adjust the slab. Ventilation slots should be made on the keel. A 10 mm ventilation gap should be left at the edge of the board. The insulation layer material must be dry to prevent the board from getting up after damp. The flatness error of the wooden floor surface should be within 1 mm.
3. The reason for the lack of strict seams is not only the installation in the construction is not standardized, the width error of the sheet is large and the processing quality is also an important reason.
4. The main reason for the local warping drum is that the board is too small or seamless, and the water pipe is leaking and dampening the wet floor. After the floor is paved, the floor paint should be painted completely. In daily use, it is necessary to prevent water from flowing into the lower part of the floor. It is necessary to clean the surface layer of water in time.
CuW alloys are used where the combination of high heat resistance, high electrical and thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. WCu alloys are also used in electrodes for electrical discharge machining and electrochemical machining.
Copper–tungsten (tungsten–copper, CuW, or WCu) alloy is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.
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