breechblock

英 [briːtʃb'lɒk] 美 [briːtʃb'lɒk]

• n. 闩体尾栓；螺体

英英释义

Noun:

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 a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing

词汇搭配

• breechblock bushing 炮闩轴衬