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| Heliarc; helium shielded arc welding | |||
| heliarc welding | |||
| Heliarc (美国诺思罗普公司的一种专利的焊接技术); helium arc welding; heliwelding | |||
| heliarc welding (法); helium arc welding (法) | |||
| 氦弧焊: 6 phrases in 3 subjects |
| Metallurgy | 2 |
| Shipbuilding | 1 |
| Technology | 3 |
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