... Then in Wooden CaseSpecification:ISO9001Trademark:AOKAIOrigin:Tianjin, ChinaLength:1-12mOutside Diameter:30-1800Slot ... industry, metallurgy industry, geothermal air-conditioning, groudwork dewatering, waterhead area development, urban water supply.Company Profile:Tianjin Aokai oil TOOLS CO.,LTD ... . located in HOGNQI ROAD,DAGANG OILFIELD,TIANJIN,CHINA, ...