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ѹ PN1.0-4.0MpaClass150-300Lb
ͨ DN50-DN1200 2"-48"
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Ʊ׼GB/T12238JB/T8527MSS SP-68API609
ṹȣGB/T12221API6DASME B16.10
HGGBJBAPIANSIISOBSDINNFJIS
׼JB/T9092GB/T13927API598
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