entrance diameter 中文意思是什麼
entrance diameter
解釋
進口直徑-
It provides performance advantages over the conventional perforator with the same diameter and similar charges, its penetration depth is increased by 7 % and entrance hole volume by 10 %
由於採用了復式射孔槍和復式射孔彈結構,使射孔彈和火藥能量得到充分利用,與一般的槍徑及彈型的射孔器比較,其穿孔深度提高7 %以上,孔容提高10 %以上。
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