basic vertical control
| data
| basic vertical control | |
| tech. | 基本高程控制 |
| data | |
| avia. | 诸元; 信息; 特性; 已知数; 论据 |
| desert. | 资料; 数据 |
| dril. | 数据采集和技术分析系统 |
| math. | 数字; 事实 |
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| 基本高程控制 | |||
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basic vertical control : 2 phrases in 1 subject |
| Technology | 2 |