管道保温

1.pipelagging  2.pipeinsulation  

管的英语翻译：

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

道的英语翻译：

path; road; doctrine; Tao; say; talk; way; method
【医】 canal; canales; canalis; meatus; passage; path; pathway; tract; tractus
viae

保温的英语翻译：

heat preservation
【化】 thermal insulation