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隔离 阀 : 50 phrases in 15 subjects |
Aviation | 5 |
Drilling | 1 |
Electronics | 15 |
General | 1 |
Laboratory equipment | 1 |
Mechanic engineering | 1 |
Mechanics | 2 |
Mining | 2 |
Nautical | 4 |
Navigation | 1 |
Oil / petroleum | 2 |
Oil processing plants | 2 |
Shipbuilding | 4 |
Space | 4 |
Technology | 5 |