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hand-operated valve | |||
hand-operating door | |||
manually operated door |
手动门 : 35 phrases in 10 subjects |
Air defense | 1 |
Automobiles | 9 |
Aviation | 1 |
Chemistry | 1 |
Hydroelectric power stations | 2 |
Nautical | 2 |
Oil / petroleum | 1 |
Rail transport | 2 |
Space | 3 |
Technology | 13 |