| |||
suspended span | |||
lifting eyelet; lifting hole; suspension span | |||
| |||
lewis hole |
吊孔 : 30 phrases in 10 subjects |
Automobiles | 3 |
Aviation | 1 |
Bridge construction | 3 |
Electric machinery | 3 |
Electronics | 1 |
Hydroelectric power stations | 3 |
Metallurgy | 3 |
Nuclear and fusion power | 1 |
Shipbuilding | 1 |
Technology | 11 |