单词	reversal valve
释义	reversal valve 换向阀;可逆阀
随便看	social type socialuied sector of the economy social undertakings social unit social units social unrest social upheaval social usage social use value social utilitarian jurisprudence social utility social valence social validation social value social value function social values social variable social view social visit social wage Social War social wasp social wealth social weaver social Web 三写易字三冬二夏三分似人，七分似鬼三分像人，七分似鬼三分像人，七分像鬼三分鼎立三分鼎足三十三天三十六策，走为上策三十六行ガクットガクテンガクトガクトガクトクガクドウガクドウホイクガクナイガクネンガクハ