breech·load·er /ˈbriʧˈlodɚ/
  後膛槍,後膛炮
  Breech·load·er n. A firearm which receives its load at the breech.
     For cavalry, the revolver and breechloader will supersede the saber.   --Rep. Sec. War (1860).
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  breechloader
       n : a gun that is loaded at the breech