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光程 | |||
光学距离; 可见距离 | |||
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光学距离; 光程; 可见距离 |
optical distance : 24 phrases in 10 subjects |
Automobiles | 1 |
Aviation | 1 |
Desert science | 1 |
Earth sciences | 2 |
Electronics | 4 |
Explosives and Explosive Ordnance Disposal | 1 |
Navigation | 1 |
Oil / petroleum | 1 |
Space | 2 |
Technology | 10 |