■產品概述JB/T5198-91管線用鋼制平板閘閥Steelparallelplatevalveforpipeline ANSIB16
JB/T5198-91管線用鋼制平板閘閥 Steel parallel plate valve for pipeline ANSI B16.5a-1992管法蘭管件 Pipe flanges and flange pipes GB/T13927-92通用閥門壓力試驗 Pressure test for universal valves JB/T9092-1999閥門的檢驗與試驗 Valve inspection and testing JB/TQ814-89鋼制平板閘閥產品閥產品質量分等 Steel parallel plate valve products quality grades ranks | |
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