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| 针孔喷气因过多的爆破能量输给引火头而使雷管破裂的现象。这种现象可能干扰缓燃剂的燃烧速度，或者在极端情况下会导致瞎炮，参见 gas venting | |||
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pin holding : 4 phrases in 3 subjects |
| Automobiles | 2 |
| Plastics | 1 |
| Technology | 1 |
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