1.flowpipe  2.streamtube  3.driftpipe  4.flowtube  

流的英語翻譯：

flow; stream; current; stream of water; class; wandering
【計】 stream
【化】 flow coating(process); stream
【醫(yī)】 current; flow; flumen; flumina; rheo-; stream

管的英語翻譯：

canal; duct; fistula; guarantee; meatus; pipe; tube; wind instrument
【化】 pipe; tube
【醫(yī)】 canal; canales; canalis; channel; duct; ductus; salpingo-; salpinx
syringo-; tuba; tube; tubi; tubing; tubo-; tubus; vas; vaso-; vessel