... for cleaning (Patent No. ZL02216280.1)Rear Spraying Systerm (folding type): Adjustable revolving tapered nozzle, good atomization ability, strong infiltration ability and ... Gun System: Flexible, convenient, improve the construction maneuverabilityAsphalt Pump (inbuilt type): High pressure, abrasion-resistant (Patent No. ZL01265258.X)Main advantages ...