Buried rotating nozzle, buried diffusion nozzle, buried ray guns, sub-valve, controller, solenoid valves. Buried rotating nozzle which there are five important patents: 1, spray nozzle can automatically commutation; 2, the top angle dial; 3, full circle and angle can be mobilized in one; 4, sabotage nozzle internal gear; Crown Technology Co., Ltd., Zhengzhou fine pin engaged landscaping, landscaping sprinkler nozzle fountain, artificial fog landscape design, construction, and landscape irrigation equipment, environmental equipment; 5, automatic memory settings during installation angle.