This occurs at the weak cannelure, which is a groove allowing the bullet casing to be sealed to the copper jacket.
这发生在脆弱的子弹槽线上，而子弹槽线是一个深沟来将弹壳
铜套里面。
This occurs at the weak cannelure, which is a groove allowing the bullet casing to be sealed to the copper jacket.
这发生在脆弱的子弹槽线上，而子弹槽线是一个深沟来将弹壳铜套里面。
声
：以上例句、词
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