防护 设备 : 33 phrases in 17 subjects |
Animal husbandry | 1 |
Architecture | 1 |
Aviation | 3 |
Drilling | 1 |
Earth sciences | 1 |
Electric machinery | 1 |
Electronics | 2 |
Hydroelectric power stations | 1 |
Information technology | 1 |
Metallurgy | 1 |
Nautical | 4 |
Oil / petroleum | 2 |
Pest control | 2 |
Rail transport | 1 |
Space | 2 |
Technology | 8 |
Telecommunications | 1 |