petrol lawn mower,petrol lawn mower test machine,test machine, gasoline lawn mower test equipment,lawn mower petrol lawn mower,petrol lawn mower test machine, ... force, 0 ~ 50Nm discretionarily set the rear wheels (driving wheel) load torque; recording engine running time and durability cycles, ... real-time display engine (blade) and the rear wheel speed; give an alarm when the engine or self- ...