Sheet will be special mask or pressure in the picture, in order to form a light matt, oil painting, virtual, stereo and other special artistic effect.

将特殊的面膜或板材压覆在图片上，以形成具有亮光、亚光、油画、虚拟，立体等特殊艺术效果的画面。

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Sterility guidelines, such as draping the patient in a sterile sheet and wearing a mask and gown, are often forgotten.

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