![File:Figure415 Stepped-thread interrupted-screw breech block.png](http://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Figure415_Stepped-thread_interrupted-screw_breech_block.png/800px-Figure415_Stepped-thread_interrupted-screw_breech_block.png)
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current | 06:21, 21 December 2012 | ![]() | 928 × 598 (17 KB) | Buster40004 | User created page with UploadWizard |
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