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Professional manufacturer of "Pneumatic Vacuum Ball Valve", the "Pneumatic Ball Valve" independently developed and produced by our factory has reliable quality, reasonable price and perfect after-sales service. "Pneumatic vacuum ball valve" is suitable for various light and heavy industries and building pipelines. Nengen quality, global sharing! ¡¾Ball valve¡¿Widely used in: chemical, petrochemical, petroleum, papermaking, mining, electric power, liquefied gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment, electronic industry, urban construction and other fields.