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。
This issue contains a wide range of contents such as source of population, household registration, education attainment, and composition of economic activities.
近郊社区人口社会重构反映于人口来源、人户关系、受教育程度、经济活动构成等方面。
This issue contains a wide range of contents such as source of population, household registration, education attainment, and composition of economic activities.
近郊社区人口社会重构反映于人口来源、人户关系、受教育程度、经济活动构成等方面。
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