“the straightway double-seater valve”的概念、定义、翻译、参考文献-科学参考

单词	the straightway double-seater valve
释义	the straightway double-seater valve Encyclopedia 工学直通双座阀释 the straightway double-seater valve直通双座阀流体流过阀体不改变流动方向，双座是指节流部分有两个阀座、两个阀芯的控制阀。
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