Q: On your machine drums so many English certification, in the end What do you mean, useful? A: Snow is on the machine drums certification generally divided into three categories: 1, OEM certification, because of the promise to always do the original oil to automotive OEMs supporting OEMs promise for authentication is the most complete in the industry, but also The most advanced. Including BMW LL-04, Mercedes-Benz MB 229.5, VW 505 507, Porsche A40 C30, are top. 2, ACEA certification (European Automobile Manufacturers engine oil quality management standards bodies), the promise for the vast majority of products through A3 / B4 certification, among the highest certification of gasoline and diesel oil inside GM. Some products through C3 certification, diesel particulate traps and catalytic converters have additional protection. 3, API certification (American Petroleum Institute), the most common, the highest recognition of certification, the promise of the lowest grade is SL, a small part of the SM, the vast majority of SN. These three stringent certification sort is: OEM Certification> ACEA Certification> API certification Wuhan Connaught Trading Company is China National Materials Germany promise for lubricants and Johnson & Johnson architectural glass membrane Hubei only designated agents. China National Materials Company will promise to lubricants to China, get the Mercedes-Benz, Volkswagen, BMW, Porsche factory certification from the German "blood" technology from the track. Contact: Mr. Li Tel: 15071058883 Contact Landline: 027-86616250 QQ: 464709734 Company Website: www.rowehb.com