1. 汽管：steam engine 蒸汽机 | steam fitter 汽管 | steam hammer 汽锤
2. 蒸汽管道工人,汽管装配工：steam fire-extinguishing ==> 蒸汽灭火 | steam fitter ==> 蒸汽管道工人,汽管装配工 | steam fitting ==> 蒸汽管道配件