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地理坐标参考〔系〕 (system) | |||
地面参照物; 地标 | |||
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地理基准 | |||
地面参照物; 地标 | |||
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世界地理代号制美国空军的 |
geographical reference : 32 phrases in 10 subjects |
Air defense | 1 |
Aviation | 7 |
Business | 2 |
Desert science | 3 |
Earth sciences | 1 |
Electronics | 1 |
General | 1 |
Geology | 7 |
Space | 5 |
Technology | 4 |