Large and small combined harvesters have received a large quantity of orders, which indicates that the harvesters have possessed considerably high performance-price ratio.
大型联合收割机、小型联合收割机开始大量接收订单，标志着各种收获机械产品已具有相当的性价比优势；
2
This paper introduces the process of repairing hydraulic cylinder by using boring and rolling combined working technology, working quantity is steady and production efficiency is high in this method.
介绍了用镗滚压复合加工技术修复液压缸筒的过程，此法修复缸筒质量稳定，生产效率高。
3
Aiming at the defects of BP artificial neural network, combined with Differential Evolution Algorithm, the paper proposes a tourist quantity prediction model based on DE-BP neural network.