This article mainly research on the economy of the 12 counties under the rule of Dali state.
本文主要研究大理州下辖的12个县市的县域经济问题。
The topic of this article mainly research and design about LD pumped solid laser high repetition frequency Q-switch system.
本课题主要是针对LD泵浦固体激光器的高重复频率的电光调q系统的研究与设计。
This article mainly research on rotation cuts in the triturating the essential spare part processing and the assembly craft questions.
本文主要研究回转飞剪关键零部件的加工和装配工艺问题。
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