sound-reinforcement system

Experimental Analysis of Ultrasonic Testing for Level of Material in Tubular Ball Mill of Fossil-fuel Power Plant; Research of Ball Mill ′ s Material Level Measurement System on Sound-electronic Measurement

火电厂钢球磨煤机料位超声检测的实验研究基于球磨机电声功率谱料位检测系统的研究

The coaching staff with unreasonable; school coaches do not sound selection system, most of the school assignment, little community participation.

教练组配备不合理；七成学校没有健全的教练员选拔制度，大多是学校指派，社会参与度较小。

The third is a sound public finance system, improve public services.

第三是健全公共财政体制，完善公共服务。

However, there is a lack of a sound and reasonable ratings evaluation system on historical character building.

但是.目前国内尚无一套完善、合理的历史风貌建筑的等级评价体系。

The system is both practical and ecologically sound.

这个系统不但切合实际，从生态学观点来看也是合理的。