单词	天文导航系统
释义	天文导航系统celestial navigation system
随便看	optical time domain multiplexing optical time domain reflectometer optical time-domain reflectometer optical time-domain reflectometer {=otdr} optical time-domain reflectometer{= otdr} optical time domain reflectometer，otdr optical time domain reflectometry optical time domain reflectometry {=otdr} optical time standard optic altimeter optic--altimeter optical timing extraction optical-to-electrical converter optical token-ring optical tolerance gage optical tomography optical tooling optical torque optical track optical tracker optical tracking optical tracking satellite optical tracking system optical track pitch optical train