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