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電(dian)動硬密(mi)封(feng)蝶閥（材質碳鋼、三(san)偏心硬密(mi)封(feng)、法蘭連接、配開(kai)關(guan)型電(dian)動執(zhi)行器）

電動硬密封蝶閥實物圖

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