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Features: 1) Design and manufacture to ANSI, API or GB 2) Valve inspection and test to API 598 3) Structure characteristics B.B OS&Y, W.B OS&Y or P.T.OS&Y 4) Material to AISI/ASTM 5) Material of main body: A105, F5, F11, F22, 304, 304L, 316, 316L, LF2
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