Nanyangcai is a large family with 18 genera and 450 species, most of which are tall trees and few harbor shrubs. It is the main tree species in tropical rain forests and one of the most important sources of commercial materials. In Southeast Asia, the wood production of this family is about the sum of other families of wood.
1. The genus Clematis genus, large arbor, tree up to 35mm, diameter 1.4m; wood luster weak texture straight; structure slightly thick, slightly uniform, weight to slightly raw; dry shrinkage, dry shrinkage of raw materials It has a moisture content of 12%, a radial direction of 4.3%, a chordwise direction of 8.9%, a differential dry shrinkage of 2.07, and a medium to strong strength. Cross-cutting is easier than sawing, and raw materials are more difficult to saw. The planing surface is smooth and the adhesiveness is slightly difficult.
2. Hawthorn is a genus of borneol, large trees, trees up to 60m, diameter 1m; wood slightly shiny, slightly staggered texture; slightly thick, uniform, heavy weight; slow drying, dry shrinkage of raw materials to moisture content 15 %, radial direction 2.1%, chord direction 4.6%, differential dry shrinkage 2.1; hardness medium to large, high strength. The processing of raw materials is easy. Because the ray cells are rich in silica, it is difficult to cut dry materials. The wood also contains tannins, which can turn the hacksaw into blue-black. The cut surface is smooth, the adhesiveness is poor, the polishing property is good, and the nail holding power is strong.
3. Hemp wood is a genus of genus Jurassic, large trees, about 167 species, trees up to 50m, diameter 1.8m; wood slightly shiny, staggered texture; thick, uniform, light to medium; dry shrinkage, dry shrinkage The raw material has a moisture content of 12%, a radial direction of 4.6%, a chord direction of 7.4%, a differential dry shrinkage of 4.63, and a low mechanical strength. Easy processing, smooth cut surface, good nailing properties and good adhesion.
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