Surface treatment is one of the key steps in automotive development, and has great influence on body quality and development cycle.

光顺是汽车开发的关键步骤之一，对汽车车身质量和开发周期有着重大的影响。

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Objective To find out the differences of body surface area between Tujia and Miao students, and to provide reference for making a health appraisal system for students' growth and development.

目的比较土家族和苗族城镇中小学生体表面积的差异，为建立中小学生生长发育健康指标评价体系标准提供依据。

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In theory, the successful development of the spray can be mucosal surface in the body a "protective shield" to prevent viruses;

理论上，成功开发的喷雾，可在人体黏膜表面形成一层“保护罩”，防止病毒入侵；

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