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作者对多年来直升飞机防治杨树食叶害虫防治线路设计原则进行综合分析研究,提出了防治线路最佳设计原则及有关涉及事项。
The author makes a comprehensive analysis and research on the design principles of helicopter prevention and control poplar leaf pest control over the years and puts forward the best design principles of prevention and control lines and related issues.