petrel 650B motor-glider 第1页

Study on the Aerial Equipment of Spraying Pesticide and the Techniques of Monitoring Ⅰ.Property Test of the Aerial Equipement of Spraying Pesticide Study on the Aerial Equipment of Spraying Pesticide and Techniques of MonitoringⅡ.Controlling Dendrolimus punctatus by the Aerial Equipment of Spraying Pesticide Study on the Aerial Equipment of Spraying Pesticide and Techniques of Monitoring Ⅲ.Controlling Dendrolimus punctatus by the Aerial Equipment of Dusting Powder