steamfitterspipefitters and sprinkler system installers
...水管工Plumbers 蒸汽管安装员、管道安装员和洒水系统安装员（已取消）SteamfittersPipefitters and Sprinkler System Installers 焊工和有关机械操作员Welders and Related Machine Operators ..
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steamfitterspipefitters and sprinkler system installers
蒸汽管道安装工和洒水系统安装工
以上为机器翻译结果，长、整句建议使用 人工翻译 。