extractor groove
... external ballistics 外弹道学 extractor groove 退壳槽 extreme range 最大射程 ...
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退壳钩槽 Extractor groove
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某舰炮退壳槽盖在放置一段时间后会出现闭合不严问题。
After placement for a certain time, the ejection slot cover has the lax close problem.
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实践证明，该方案有效地解决了该型舰炮的退壳槽盖关闭不严的问题。
The practice showed that this solution can effectively solve the lax close problem of ejection slot cover in this type of naval gun.
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