Commerce development was a main way to promote the form of multiple economy and economic interchange and complement in northwest area.
商业开发是促进西北地区多元经济形成和经济交流、互补的主要渠道。
Parallel operation network introduced in this paper provides multiple possibilities for machining complicated parts, which form a basis to improve product quality and achieve better economic benefit.
本文介绍的平行工序网络为复杂零件提供了多种工艺方案的可能性，为提高产品质量和经济效益提供了依据。
应用推荐