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环 缝 : 109 phrases in 23 subjects |
Architecture | 1 |
Automobiles | 2 |
Aviation | 3 |
Bridge construction | 1 |
Chemistry | 4 |
Drilling | 1 |
Electric machinery | 1 |
Electronics | 3 |
General | 3 |
Hydroelectric power stations | 2 |
Latin | 3 |
Metallurgy | 21 |
Natural sciences | 1 |
Nautical | 1 |
Oil / petroleum | 8 |
Plastic surgery | 2 |
Plastics | 4 |
Skydiving | 1 |
Space | 3 |
Technology | 28 |
Textile industry | 14 |
Welding | 1 |
Wind Energy | 1 |