[機(jī)械工程 照明 加熱] 球狀單向閥 check valves: 止回閥lift check valves: 升降式止回閥lining check valves: 襯里止回閥swing check valves: 旋啟式止回閥vertical lift check valves: 立式止回閥下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
