ϵ ֻ ū ظ ־ ̺(ϸ ݺ) ź ذ ȴٸ ǰ ʿϴٰ ߴ.
ϳ 濬 ǰ ֱ ֻ ٿ ū ظ ִ ̺ ̺ 10~25% Ǿ ź 2~5% Ǿٰ 鼭 鼭 ̶ ߴ.
̺ ٿ ܿ ̵ 5 Ǿ 氥 ϰ Ȳ Ǿ ̺ ϱ ؼ ö ϰ η ٶ ִ ߿ϴ. ߺ Ŀ ݺؼ ܿ ϴ Ȯ ִ.
ź ǿ ջ ̵ Ǿ ǿ Ÿ.
Ư ǿ ڵ Ÿ Ʒ 귯 ؿ ִ ǵ ִ ǵ IJ Ͽ ־ Ѵ.
ּ ȯ濬 “”ǰ ȮⰡ 10 ϼ ķ 1 ̻ ־ طκ Ƚ ” “ ÷ 캸 Ȯ ع Ѵ” ߴ.
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