... patent is ZL2008 2 0229319.1.3,composite expanding type flow meter,the number of patent is ZL 2008 2 ... RGfs2007-0913&RGfs2007-0914.because Rixin flow meter with first-class measuring system,high-tech products,zero defect quality guarantee. ... China company name item nameDaqing Oilfield,Chinafeedstock,light gasoline,high temperature residueHuabei Oilfield,Chinawater,sewage,Single well oilwater,sewage, ...