... durablity Detailed Product DescriptionLLQZ intelligent gas Roots flowmeterIntroduction: LLQZ intelligent gas Roots flowmeter is a highly accurate metrological ... composed of measuring chamber body, a pair of Roots rotor, transmission components and registry unit. It is ... to customers’ optionTechnical standard: JB/T7384-94 gas Roots flowmeterMarket service: gas metrology for oil and chemical industry ...