... welding manufacture 2.Approved EN ISO 3834-3, DIN EN ISO 3834-3, ISO9001:2008 3.Benz's supplier welding iron bus seat ... welding seat base Quality certificat: ISO9000:2008 , EN15085-2, ISO3834-3 High technique of welding, stamping, bending, coating, injection moldingPS:We ... in the near future. welding bus seat back support AL-0012