并列题名：Agricultural transformation and the development of agricultural machinery service in China Agricultural transformation and the development of agricultural machinery service in China 并列题名：Research on the development of agricultural income insurance in China National report on innovation and development of agricultural machinery industry 并列题名：Research on the optimization and development of agricultural insurance system in China Research on the development of agricultural income insurance in China On formation and development issues of agricultural machinery service organization Research on the optimization and development of agricultural insurance system in China 并列题名：Agricultural transformation and green high quality development 并列题名：Report on innovation and development of China's agricultural machinery industry