... .6m, c1.8m, c2.1m, c2.6m, c3.0m, etc. models. And by length of the body, there are 25m, 30m, 40m ... .Classified by drive mode, the products have left and right( from feed end) drives, if not specified in contracts, the products will ... ; classified by carrying capability, the driving devices have associated mode and small gear assembly mode; classified by structure, the products have open ...