| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multilayered mask which shows a highly efficient filtering effect for a long time, has a high ventilation rate and has a function as a rain deflector. <P>SOLUTION: The multilayered mask is comprised of a cup type mask, a filter mask and a rain deflecting mask, wherein many filer media are stored in a case of the filter mask and a vacancy is made between a mask body of the cup type mask and the case of the filter mask so that it shows a highly efficient filtering effect for a long time and has the high ventilation rate, and a vacancy which opens naturally downward is formed between the filter mask and the rain deflecting mask so that it has also the function of deflecting the rain from the filter mask hereby. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
