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| 氧弧炔切割; 气割 | |||
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| 氧弧切割; 氧气电弧切割 | |||
| 氧气弧切; 电弧氧气切割; 氧焰切割 | |||
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oxy arc cutting : 1 phrase in 1 subject |
| Welding | 1 |
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