长焦距平行投照技术
Distant paralleling technique
等距平衡点。
equilateral libration point
降水量距平百分率
precipitation anomaly percentage
近间距平行隧道
small spacing parallel tunnels
近距平行跑道
closely spaced parallel runways
距平值
Solving by distance apart from average
可变节距平行调节
variable pitch propeller control