... . 2. Sauer hydrostatic unit, reliable quality. 3.Mature products, hot sale 0.5 ton single drum vibratory trench roller The effort of ... design on drum. It is widely used to compact on roadbed, and it is specially used to backfill for trenches, chmannel, ... , fixed displacement motor, stepless speed, easy to change direction; 3.Hydraulic controlling steering system, efficient and convenient;4.NSK/SKF ...