Zhongqiu - A Compact Ball Valve - Utility Model Patent Certificate
Zhongqiu - A debugging device for electric actuators used in valves - Utility model patent certificate
Exterior Design Patent Certificate
Exterior Design Patent Certificate
Appearance Design Patent Certificate [No. 5243967]
Exterior Design Patent Certificate [No. 2711798]
Zhongqiu - Automatic Buried Arc Welding Equipment - Invention Patent Certificate
Zhongqiu - A steel ball valve - Invention patent certificate
Zhejiang Province Science and Technology-based Small and Medium-sized Enterprise Certificate
Scientific and Technological Achievement Appraisal Report (Anti-static Safety Ball Valve, High-pressure Hollow Ball Valve)
Safety Production Standardization Certificate
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