配风支管 air distribution line

分支通风管 branch duct

鼓风支管 blast connection

通风管支架 air tray ; air pipe tray ; VENT DUCT SUPPORT

通风支管 branch vent

支撑风管系统 Durkeesox IRRTM Air Duct System

总风缸支管 [铁路] main reservoir branch pipe

风管支架 suppotof duct ; support of duct

卡丹式送风支管 cardan blast pipe