 |
| |||
| 液面标记 | |||
| 水准点; 水准标石 | |||
| 高程点; 水准面标记; 基准面标记 | |||
| 水准面点; 水平标志; 基准面 (标记) | |||
| level mark: 26 phrases in 9 subjects |
| Automobiles | 5 |
| Bridge construction | 2 |
| Engineering geology | 3 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Technology | 10 |
| United Nations | 1 |