... release easy to stop up, very inaccessibility long-term stability movement; 2nd, water power resident time long (30-50min), the ... is widespread, the simplicity of operator, merits and so on automatic movement, are incompatible to the dirt(fat) and the oil field ... dregs, the platoon putty, the platoon granulated substance system, the automatic control.7, the power consumption are few, the synthesis run ...