| 释义 |
automatic breech mechanism automatic breech mechanism[¦ȯd·ə¦mad·ik ′brēch ‚mek·ə′niz·əm] (ordnance) A device that utilizes the energy of recoil, or the pressure of the powder gases, to open the breech, withdraw the fired cartridge case, insert a new cartridge, and close the breech. |