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| 自由界面自然排气爆炸胀形这种胀形的特点是,水介质的界面与毛料端面平齐，毛料的端面是一个自由面。自由界面附近的冲击波受到很大削弱，由于气团离水面很近，很快就冲出水面。零件成型后的上部端口极易形成收口状，即使增大药量这种现象也是不可避免的。这种方法在实际中应用较少 | |||
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free air-out explosive expanding : 3 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 3 |
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