回 转 轴 : 46 phrases in 14 subjects |
Animal husbandry | 1 |
Automobiles | 1 |
Bridge construction | 1 |
Chemistry | 2 |
Construction | 2 |
Drilling | 1 |
Electronics | 1 |
General | 3 |
Metallurgy | 2 |
Oil / petroleum | 3 |
Plastics | 1 |
Rail transport | 1 |
Technology | 25 |
Wind Energy | 2 |