桿式安全閥 direct weighted safety valve: 直接荷重式安全閥weighted safety valve: 重量安全閥double lever safety valve: 雙杠桿安全閥lever and weight safety valve: 杠桿重錘式安全閥lever safety valve: 杠桿安全閥; 杠桿式安全閥下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯