n. chord
受力弦材 stress chord
下弦材 bottom chord
弦材应力 chord stress
弦面材 bastard lumber ; Slash-grain lumber ; Flat-grain lumber
弦锯材 flat-sawn timber
正弦背景素材 Abstract Vector
器材弓弦护弦绕线器 RAOXIANQI
上弦杆主要材料 Upper Chords main material
下弦杆主要材料 Upper Chords main materia
导管是对酸雨敏感的一种组织，受害材导管的弦向直径小于健康材。
Vessel is known to be sensitive to acid rain, its tangential diameter of diseased poplar decreased than that of healthy poplar.
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