| 摘要 |
PURPOSE: Provided is a mask with adjustable length which adjusts the length of a binding string to place the mask at workers' face closely so that it prevents the workers from inspiring noxious materials and dusts during work. CONSTITUTION: The mask with adjustable length comprises the parts of: a body(20) wherein a hook(21) is combined with one side of the binding string(31b) to bind the other side of the binding string at one edge, a first penetration hole(23) is formed to insert the binding string at the other edge and a suspension tool(22) is formed between the hook and the first penetration hole; and a length adjusting part(10) wherein a second penetration hole(12) is formed and inserted into the suspension tool at one side and a third penetration hole(13) is formed to fix the binding string inserted into the first penetration hole at the other side.
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