1,Professional R&D management; 2,High safety; Superior precision . 3,Lower noise and attrition and repair rate 4,CE&GS ELK:1. Respective dollies in the system are independently driven. 2. A structure composed of track ,side track for horizontal movement ,, t urnplate ,and other sections ,t form a 3D network for material conveyance 3. Multiple control mechanism,able for centralized control , ...