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1寸阀门是dn多少_家居日记
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1寸阀门是dn多少

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1寸阀门是dn多少 一寸内径约25毫米，一寸半约DN40毫米，通常美标阀门以寸为单位，国标基本上以DN。那DN20的阀门规格为6分，阀门上的寸是英寸，1英寸=2


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