ǽ ûҴ ûҹ ϸ ûҸ Ų.
1970 ̱ а迡 ſ ûұ ȿ ѿԴ.
Ϻ ǻ ûҰ ü ִٰ ϰ ְ,
ٸ Ϻδ ûҰ Ʈ ī ⸦ Ѵٰ ϰ ִ.
, ̷ Ǵ 뿡 Ǵµ,
̴ ûұ ȿ Ѵ.
⼭ ϴ ȿ Ͷ HEPA(High Efficiency Particulate Arrest) ϴµ,
HEPA Ͷ 0.3 ũ ڸ 99.97% ִ ̴.
Ƿ, Ӹ ƴ϶ ̳ 輳 Ϸ
ݵ HEPA ä ûұ⸦ ؾ Ѵ.
ǽ ûҴ п , , 2 ϰ,
˷ ι Ͽ ִ ̹Ƿ ֱٿ ް ִ.
̱ȸ(1990) dz ȯ 鼭
"HEPAͰ ϰ ȿ Ѵ.
뷮 ϰ,
߾ ⸦ ǹ Ѵ" Ѵ.
*ũ HEPA ^^
ڸ ǰ Ͽ ּ ϰڽϴ!