在内部作成圆形凸肩以代替锐缘孔板状的侧面。
It has rounded shoulders inside instead of the sharp orifice - like edge.
在内部作成圆形凸肩以代替锐缘孔板状的侧面。
It has rounded shoulders inside instead of the sharp orifice-like edge.
具缘纹孔的闭塞率较低以及部分具缘纹孔周缘破裂是高频真空干燥后木材浸注性提高的主要原因。
Low pit aspiration ratio and cracks of some bordered pits are the main reasons for increasing liquid impregnation after radio-frequency vacuum drying treatment.
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