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SINOPEC MARKETING SOUTH CHINA COMPANY

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  • Guangzhou, CN
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  • Information Patent Application

    FOUR VALVE DISC FRICTIONLESS BALL VALVE
    • Publication number 20200240528
    • Publication date Jul 30, 2020
    • SINOPEC MARKETING SOUTH CHINA COMPANY
    • Zhongshan TIAN
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

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