various of gear rings as per customers' drawings and specifications Dalian yipin machinery ... them including 4 nondestructive testing inspectors all with level 3or 2 certificate who can do UT,MT and PT,etc as ... ISO9001 by IAF,welding quality system audited conforming to ISO3834-2 by IIW,manufacturing approval by DNV and LR,welding approval ... 00,export sales is USD5,000,000.00. ISO9001 ISO3834-2 metal gear