... .6V,7.5AH lithium batteryCompany ProfileCHANGZHOU CHENGFENG FLOWMETER CO.,LTD was established in 1979,our company is the professional ... manufacturer of flowmeters,thermometers,liquid level meters,transmitters and so on.The main products are contain ... F)metal tube flow meters,organic panel type pure water flow meters,UHC magnetic flap liquid level meters,LUGB/LUCB vortex street ...