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| holding time (焊管水压试验的); pressure holding time (水压试验的，液体模锻的) | |||
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持 压时间 : 7 phrases in 4 subjects |
| Communications | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 3 |
| Technology | 2 |
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