falling block locking breech起落: rise and fall; up and down式: type; style闭锁: shutting; bottoming; interlo ...枪机: gunlock; rifle bolt; firearm ...翻动式闭锁: hinged block下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:称为起落式闭锁枪机，即可在微信中查询翻译
