Environmental Biological Principles （环境生物基础） Physical and Process Principles （物理及工艺基础） Environmental Chemical Principles （环境化学基础） ..
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According to different principles of gas process, it can be divided into physical foaming and chemical foaming.
根据发泡剂发气过程原理的不同，可以分为物理发泡和化学发泡两大类。
The authors describe the physical and chemical principles of the washing process, as well as the composition, production and action of household and industrial detergents.
作者描述洗的物质和化学原则处理，以及组成，生产和家庭和工业洗涤剂的行动。
The article discusses the controlling and adjustment of the teaching process in Physical Education by the principles, features, knowledge, domination, feedback effects and so on.
本文以教学过程的规律、特点、认识、控制、反馈效果等观点论述体育教学过程的控制和调节。
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