... bus in China.CQSD has strong technical force, advanced technology and hundreds of equipments and inspecting instruments which ensure our products high ... won a good reputation at home and abroad.The leading products are as follows: synchronizer, gearbox housing, gear and shaft, ... 5S-150GP, 5S-111GP, QJ805, QJ1506, S6-90 etc. Our products are mainly applied to gearbox of the following vehicle brands ...