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气密性: 79 phrases in 19 subjects |
Air defense | 1 |
Automobiles | 1 |
Aviation | 2 |
Business | 1 |
Chemistry | 2 |
Electric machinery | 2 |
Electronics | 2 |
Hydroelectric power stations | 1 |
Management | 1 |
Metallurgy | 7 |
Nautical | 1 |
Oil / petroleum | 4 |
Plastics | 1 |
Rail transport | 6 |
Refrigeration | 2 |
Shipbuilding | 15 |
Space | 10 |
Technology | 19 |
United States | 1 |