R&D and QA

DB Certificate

TYHI has professional production lines covering the whole process from smelting to wheelsets assembly. We have obtained qualifications and certifications like ISO, IEC, IRIS, CRCC, AAR, TSI, DB, MOLIT and RISAS, etc. More than 5,000,000 high-quality wheels, axles, gearboxes and wheelsets have been exported to over 50 countries and regions.

男女做爰高清免费视频-男女做爱-男女做爱视频-男女做爰视频 免费