溢流管道系统 piping system: 管道系统; 管汇系统; 管系agent piping system: 灭火剂管路系统bilge and ballast piping system: 舱底水和压载水系统cargo piping system: 货物管路系统closed piping system: 封闭容器下载手机词典可随时随地查词查翻译