Gaode GEC-311 is a kind of screw type mortar plastering machine. It has features of reasonable design, continuous flow, even spraying, strong adhesion, high speed and with low cost. This type cement plaster pump could spray common cement mortar, fire prevention materials and refractory material. Now this plastering pump is widely used in many fields, such as indoor and outdoor ceiling spray, expansion joint leakage, settlement leakage, subway leakage, tunnel leakage, mine plugging, air defense plugging works, dam leakage plugging, floor, cracks, and hollowing reinforcement.