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High-Pressure Flange, Necked Slip-on Flange, Necked Slip-on Flange Plate, Special-Shaped Small-Bore Flange for Industry, Find Details and Price about Large Diameter Flange Flat Face Flange from High-Pressure Flange, Necked Slip-on Flange, Necked Slip-on Flange Plate, Special-Shaped Small-Bore Flange for Industry - Shanghai Prime Metallurgy Technology Co., Ltd