空中加油导管连结在飞机油箱上长的套空管，油料通过它流向空中被加油的飞机 A long hollow tube attached to a tanker aircraft, through which fuel flows to another aircraft being refueled in flight.
截导管这种管子的一部分或一段 A section or piece of such a tube.
管子，导管，输送管用来输导液体、气体或固体细末的管状中空圆柱体 A hollow cylinder or tube used to conduct a liquid, gas, or finely divided solid.
这是包电线的导管。 It's a conduit enclosing insulated electric wires.
