and the length shall not be greater than 20mm.The advantages of the appearance of the large core board are good in screw strength, high in strength and quality Strong, sound-absorbing, heat-insulating and other characteristics, and the moisture content is not high, between 10% -13%,

the processing is simple.The machine fight the plate by the squeeze force is larger, the gap is minimal, smooth mosaic, bearing the weight evenly, Long-term use, compact structure is not easy to be deformed.Bad core board has disadvantages of poor moisture resistance.Handmade is to artificially insert wood strips into the splint, the wooden strips are subjected to less extrusion force, uneven splicing,

large gaps, and nail holding power. Poor, not Can be sawing processing, only suitable for some of the decoration of the sub-projects, such as solid wood floor mats, etc.. 5, fir board is the use of short plywood board through the long finger, the width of the synthesis of large-scale thick plate.
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