 |
| |||
| conventional level; reference level; relative height; datum (level) | |||
| reference datum; reference plane | |||
| reference level (liquid level) | |||
| datum level | |||
| vertical datum | |||
| reference elevation | |||
| reference height | |||
| Bezugshöhe: 4 phrases in 1 subject |
| Optics branch of physics | 4 |