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  • electronicsd posted an update 1 week, 3 days ago

    https://www.shut-offgasvalve.com/product/screw-valve/

    Motor valve products comply with T/ZZB 0728-2018 “Smart Gas Meter Motor Valve” Standard and A-tex, IECEx explosion-proof certification standards, technology to achieve “domestic first-class, international advanced” level.