breaking knife
... 撞击弹回式分选器 bumper mill; 撞击刀 breaking knife; 撞击底火 percussion primer; ...
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由于撞击夹刀块的能量包括爆炸气压和冲块的动能两项，所以夹刀块能获到很大的初始加速度。
Since the energy which strikes the tool holder includes the explosive gas pressure and the kinetic energy of the moving plunger, thus a high initial acceleration of the tool holder is obtained.
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