| 摘要 |
A mask for covering a person's face while welding. The mask includes a body adapted for covering the person's face, the body having a window with a translucent lens positioned over the window. The lens include at least one translucent slat, each slat having a first end and a second end. The first end of each slat being pivotally supported against the body of the mask and movable from a first position where each slat covers a projected area over the body to a second position where each slat covers a reduced projected area over the body, so that part of the face is exposed when the slats are in the second position.
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