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光信号 : 244 phrases in 26 subjects |
Air defense | 5 |
Animal husbandry | 1 |
Architecture | 2 |
Automobiles | 19 |
Aviation | 9 |
Baseball | 1 |
Communications | 3 |
Construction | 1 |
Electronics | 49 |
Environment | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
General | 13 |
Hydroelectric power stations | 1 |
Information technology | 1 |
Metallurgy | 7 |
Oil / petroleum | 5 |
Plastics | 1 |
Rail transport | 3 |
Scuba diving | 1 |
Shipbuilding | 1 |
Skydiving | 1 |
Space | 8 |
Technology | 93 |
Telecommunications | 14 |
Textile industry | 1 |
Wind Energy | 1 |