基本解释[土木建筑工程]下泄冷却剂英汉例句双语例句The letdown ion exchangers (demineralizers) are designed to remove ionic impurities from the reactor coolant.净化床的作用是除去冷却中的离子态的杂质。词组短语短语reactor coolant letdown 一回路泄压专业释义土木建筑工程下泄冷却剂