cannelure

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

也适用于一切腐池。

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

这发生在脆弱的线上，而线是一个深沟来将壳密封到铜套里面。