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| 点火系统/示波器点火线 | |||
| 投手板 | |||
| 射击地线 | |||
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| 引火线 | |||
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| 火〔点火，导火，射击，第一〕线; 引爆绳; 流水作业线; 工作线; 安装石油运输管线的工地 | |||
| 焊接管道接缝的主要焊接工班; 修理管线区域; 石油管线工地; 火线 | |||
| firing line: 8 phrases in 5 subjects |
| Drilling | 1 |
| Forestry | 1 |
| Oil / petroleum | 1 |
| Shooting sport | 3 |
| Technology | 2 |
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