์–‘์ง€๋ฐ”๋ฅธ ํฌ์ง€์…˜๋“ค์ด ์‹น ๋‚ ๋ผ๊ฐ”์–ด
5~10% ๋ฆฌ์Šคํฌ๋กœ ๊ตด๋ฆฌ๋˜ ์ฑŒ๋ฆฐ์ง€ ๊ณ„์ •์€ 16๋ฐฐ->3๋ฐฐ๊ฐ€ ๋จ