breech block

• n. 枪闩(尾栓；闭锁机；游底；螺体)

breech block的英文翻译是什么意思，词典释义与在线翻译：

英英释义

名词 breechblock:

1. a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing