Shantui bulldozer mounted on the tractor in the front-end of a bulldozing blade in shoveling and earthmoving earth moving machinery, for earth-moving, flat building site, etc. Using mechanical transmission or with a hydraulic torque converter of hydro-mechanical transmission system, there are a few with hydraulic drive systems. By the tractor-driven machine, having broad, blunt and level push shovel to clear land, road construction or similar work. Shantui bulldozer clutch what is the classification of