手 摇 钻 : 51 phrases in 12 subjects |
Architecture | 4 |
Automobiles | 5 |
Bridge construction | 1 |
Computer numerical control | 1 |
Construction | 2 |
Drilling | 2 |
Engineering geology | 1 |
General | 4 |
Measuring instruments | 1 |
Metallurgy | 1 |
Technology | 28 |
Wind Energy | 1 |