內(nei)螺紋(wen)疏水(shui)(shui)閥（材質碳鋼、內(nei)螺紋(wen)連(lian)接、用于(yu)蒸(zheng)(zheng)汽加熱設備(bei)、蒸(zheng)(zheng)汽管網和(he)凝結水(shui)(shui)回(hui)收系統）
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