navigationn.导航；航行；航海navigation aids导航辅助设备,助航设备,航行标志navigation wind航行风navigation bore通航孔Navigation Tree导航树navigation lamp航行灯navigation coaln.汽锅用煤(锅炉煤；蒸汽煤)navigation model导航模型navigation guide导航条Navigation Route航线navigation point导航点