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花旗松方木
花旗松建筑方木
花旗松建筑方木

花旗松方木


彎曲(一)、產生的原因

1、 主要由于徑向和弦向干縮不一致而產生,尤其是弦向板易發生彎曲;

2、 被干木材的材堆堆積不正確,隔條厚度不均勻,隔條上下位置不在同一條直線上;

3、 被干木材厚度不均勻;


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波多野结衣无码在线观看