| 摘要 |
A respirator consists of a filtering semi-mask with a hood, a clamping element, eye-rings generated by the bent angles of the semi-mask. For simplifying the manufacturing technology, the semi-mask is made of two identical parts in the shape of the isosceles trapezium joined by the suture from three least sides. The eye-rings are fixed by weld penetration of two openings for attaching the hood.
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