[航]?能见半径
... 挠性陀螺仪 flexure gyroscope 能见半径 radius of visibility 能见度极好 ceiling and visibility unlimited ...
?视界半径
... radius of visibility 能见半径 radius of visibility 视界半径 radius vector 辐向矢径 ...
?能见度半径
... 镭,磷光 radiumluminescence 曲率半径 radius of curvature 能见度半径 radius of visibility ...
能见度半径
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