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Fire trench pipe fittings rigid clamp elbow three-way four-way conversion flange blind plate 168 133 325 108

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Groove pipe fittings steel wire buckle pipe fittings lined with plastic wire connected to the inner wire direct DN15DN25 groove fire pipe fittings pipe hoop

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Foreign Trade Groove Split Flange Steel Card 168 Single Flange US Standard class150LB Groove Flange 16k