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atomic-hydrogen arc
| welding
| atomic hydrogen arc | |
| met. | 原子氢电弧 |
| welding | |
| exhib. | 57.焊接 |
| hydroel.st. | 焊接 |
| met. | 熔接; 定位焊接; 粘结; V 施焊部位坡口修整 |
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| 原子氢电弧 | |||
| atomic-hydrogen arc: 3 phrases in 3 subjects |
| Automobiles | 1 |
| Electronics | 1 |
| Technology | 1 |
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