| |||
normal; plumbline | |||
plummet | |||
vertical line | |||
plumb line; lead line | |||
pedal line | |||
plumb bob line; plumb-bob vertical | |||
frontal-profile line; geographic vertical; geographical vertical; lead plumb; plumb; plumb bob | |||
| |||
vertical line | |||
| |||
plumb line |
铅 垂线: 19 phrases in 6 subjects |
Aviation | 1 |
Earth sciences | 1 |
General | 2 |
Hydroelectric power stations | 4 |
Hydrology | 1 |
Technology | 10 |