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Jingsu HG 20592 316 neck butt welding flange A type PN25 DN400 RF, Flange - Amazon.com
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Sanjay Bonny Forge - Pipe Fittings & Flanges Manufacturers India
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Measurement of small rotation angle of flange joints by a novel flexure magnifying mechanism - ScienceDirect
Weld Neck Flange RF ASME B16.5
