relief valve英 [rɪˈliːf vælv]美 [rɪˈliːf vælv]网络 泄压阀; 减压阀; 泄放阀; 溢流阀; 安全阀化学英英释义nouna valve in a container in which pressure can build up (as a steam boiler)Synonym:safety valveescape valveescape cockescape双语例句