NINGBO YOUWIN SMART METER CO.,LTD. .is located in Ningbo , which is universally recognized as the city of water meter It is an enterprise specialized in research and development, production and export of various water meter and its accessories. YOUWIN can produce 8 mm to 500 mm are including the CLASS D(R200) water meter series with volumetric rotary piston water meter ,and the CLASS C(R160) water meter series with multi- jet dry- dial type water meter , rotary piston water meter, multi-jet ...