单词	外开关
释义	外开关external switch
随便看	navigation bar navigation beacon navigation bridge navigation by earth references navigation by map matching navigation by map-matching navigation by space references navigation channel navigation channel chart navigation chart navigation clock navigation coal navigation communication satellite navigation computer navigation computer control navigation computer control，ncc navigation computer--nc navigation computer unit navigation computer unit，ncu navigation computer，nc navigation constant navigation consultant navigation control simulator navigation control simulator，ncs navigation coordinate