breech·block 
(brēchblŏk′)
(brēchblŏk′)n.
The metal part that closes the breech end of the barrel of a breechloading gun and that is removed to insert a cartridge and replaced before firing.
| 单词 | breechblock |
| 释义 | breech·block (brēchblŏk′)n. The metal part that closes the breech end of the barrel of a breechloading gun and that is removed to insert a cartridge and replaced before firing. |
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