... . HAVE BEEN APPROVED WITH DOT, ISO9001, CCC, ECE ADVANCE LAYING TYRES 14-17.5 L-2E Guizhou Tyre Co., LTD is ... and buses,OTR , Agricultural, Industrial and Solid tyres. GTC manufactures both radial and bias tyres. GTC has obtained the ISO 9001,ISO14001 ... E-Mark and the Gulf Standard GCC certification. ADVANCE LAYING TYRES 14-17.5 L-2E