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.
该冲头包括端部，该端部适于刺穿入口孔并折弯环绕该入口孔的材料，以沿着该入口孔的内缘形成残留的废料。
The punch includes an end portion adapted to Pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole.
该冲头包括端部，该端部适于刺穿入口孔并折弯环绕该入口孔的材料，以沿着该入口孔的内缘形成残留的废料。
The punch includes an end portion adapted to Pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole.
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