backflow preventer
词语： backflow preventer
解释： 回流防止器,防回流设备
词性： 名词
词典： 水利专业英汉词典
backflow preventer 相关解释
backflow preventer 回流防止器,防倒流装置
backflow preventer是什么意思、英文翻译及中文解释大纲
英学录
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