| 摘要 |
A mask includes a body having a through hole with which a goggle is engaged. Two first holes are defined in the body and located on two ends of the through hole. The goggle includes two side parts which are located on inside of the through holes. Two positioning plates each have a first positioning hole and a second positioning hole which communicates with the first positioning hole. Two locking members each have a protrusion which extends through the first hole, the side part and the first positioning hole, the positioning plates are then pulled to shift the protrusions to be engaged with the second positioning holes.
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