... Transporter We have started the production of gear box in 2004, we introduced advanced technology of gear box in the world and ... -7m3,9m3,10m3,12m3. . this series of products have the below characteristics: they are made of two-stage planetary gear box, and driven by ... roller capacity could reach 14m3. There are many outstanding feature of the gear box: fine performance, high reliability, high safety, ...