external single meaning in English

外部单根

Shipbuilding - clear openings through frames for external single - leaf doors
船用外部单扇门门框通孔
Ships and marine technology . clear openings for external single - leaf doors
船舶技术.外开单扇无障碍通道
Ships and marine technology - clear openings for external single - leaf doors
船和海运技术.外单叶门的清洁开关
Ships and marine technology - clear openings for external single - leaf doors
船舶和海洋技术.外部单扇门净开口
Iso 3796 : 19 ships and marine technology - clear openings for external single - leaf doors iso 3796 : 1999 ; german version en iso 3796 : 2001
船舶和航海技术.外开单扇门的无障碍通路