| 单词 |
airborne control system |
| 释义 |
airborne control system airborne control system[′er‚bȯrn kən′trōl ‚sis·təm] (geodesy) A survey system for fourth-order horizontal and vertical control surveys involving electromagnetic distance measurements and horizontal and vertical measurements from two or more known positions to a helicopter hovering over the unknown position. Also known as ABC system. |
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