Sprinkler for irregular sprinkling areas

All methods were summarized and discussed on the basis of analyzing the domestic and overseas methods about sprinkler for irregular areas in order to know the history and present situation of the study on sprinkler for irregular areas. In author's opinion, at present, the study at home is much poorer than abroad and there are two important ways to study sprinkler for irregular areas: complex movement and abnormal nozzle. But the former is difficult to be accepted widely because of its high costs.