... unloading device, roots blower or vacuum pump), Positive press pneumatic conveying machine (pressure pump, combination pump, Air compressor) and ... are widely used in building materials (cement, fly ash, and mineral powder), food, chemical, power, fuel, metallurgy, and so ... 18, 20, 25, 30,35m. Productions:XS series bulk pneumatic ship unloading conveying equipment, it can suction the materials from ...