| 摘要 |
PROBLEM TO BE SOLVED: To provide a nose filter having a superior filterability and a strength with simple structure. SOLUTION: The nose insertion type filter 1 has the sidewall part and the top part formed from nonwoven fabric and the sidewall part 1b is fine enough to have an automorphic property and the top part 1a and its near area has a structure that is rough enough to have no interference for breathing. Thus it brings down the vibrissa to the nostril side face to decrease the resistance of aspiration and makes the breathing easier. |
