breech-block

英 [b'riːtʃbl'ɒk] 美 [b'riːtʃbl'ɒk]

• 枪机,炮尾栓,炮闩

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 a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing