| 摘要 |
An eyes, nose and mouth protecting device of figure (1) contains 0.1-1.55 wt.% scent, and 98.5-99 wt.% PVC contg. frames (1,5). The frames hold an eye protector (2) having 0.5-10.9 micron dia. apertures, and a nose and mouth protecting unit (4). Frames are linked firmly by a connecting piece (3). |
