sluice valve 短语 [化] 断流阀 词形变化 sluice valves 复数 释义与例句 n. 1. Synonym of gate valve. 词汇关系 名词 同义词 5 watergate floodgate headgate penstock sluice gate 上位词 1 regulator 整体词 3 sluice penstock sluiceway