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| 视距测量利用光学测量仪器内的分划装置和目标点上的标尺测定距离的测量方法 | |||
| 视距测量 | |||
| 视距测量 (法) | |||
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stadia survey : 8 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 2 |
| Technology | 5 |
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