阐述了工业废水的好氧和厌氧处理工艺的一般知识和选用原则。
This paper expounds the general knowledge and selecting principle about aerobic and anaerobic treatment processes of industrial wastewater.
从理论上分析了消泡剂的消泡原理，概述了消泡剂的选用原则及评价方法。
The antifoaming principles of antifoaming agents were analyzed in theory, and the selection principles and evaluation methods were described.
论述电连接器及其组件质量检测仪器设备的选用原则和配备合理性检查方法。
Discuss the principle for selection of quality testing device and equipment of electric connecter and its components and equip the reasonable testing method.
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