cannelure

Suitable for all rotten pond too , floorpassway and cannelure , etc .

也适用于一切腐。

This occurs at the weak cannelure, which is a groove allowing the bullet casing to be sealed to the copper jacket.

生在脆弱的子槽线上，而子槽线是一个深沟来将壳密封到铜套里面。