The reason and prevention of four kinds defects including surface wrinkled skin (carbon built-up), chock, blow hole, deformation, was introduced in this part of the article.
本部分主要介绍表面皱皮（积碳）、呛火、气孔、尺寸超差及变形等缺陷的产生原因和防止方法。
It can form a smooth film in surface skin and calm damaged skin, light the dry, wrinkled, slack and pigmented skin caused by sunshine.
能够在肌肤表面形成丝滑薄层，平和受损肌肤、淡化由日晒引起的肌肤困扰问题。
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