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| height survey; elevation survey | |||
| altitude survey | |||
| vertical survey | |||
| levelling | |||
| altimetric measurement | |||
| leveling | |||
| altimetric survey; elevation surveying; height measurement; high control survey; hypsometry (法); level survey; measurement of altitude; measurement of level | |||
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| vertical survey | |||
| 高 程测量: 95 phrases in 14 subjects |
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