[油气] 钻杆公称质量 nominal mass: 名义质量drill pipe: 钻杆; 钻管钻油台; 钻探管pipe drill: 管子内罗车丝锥nominal pipe diameter: 标称管径nominal pressure for pipe components: 管道元件公称压力; 管道组件公称压力下载手机词典可随时随地查词查翻译