:   10 3 Ȯ ȭǰ

ȭǰ ǥ ࿡ ұϰ ǥû׿ Һڵ ƴ.

ǰǾǰû ҺڽùθӰ ۳ 10, 10~50 500 'ȭǰ Һ ν' ǽ , ǥû Ȯ ϴ Һڴ 31% ʴ Ÿٰ 12 .

Ư 10 76%, 20 78% ǥû Ȯ ʰ ִٰ , 30~50(60~65%) ȭǰ ǥû Ȯϴ Ÿ.

װ ľû Ϻ ȭǰ к ߻ ɼ ǰ ־ 'ȭǰ ǥ' Һ ˱Ǹ ñ ȭ, Һڵ ǥ׿ ɰ ν ſ Ÿ.

' к ְ ǽɵǴ ȭǰ ϰڳ ؼ 10~20 33~47% ʰڴٰ , 30 ̻ 63%̻ ʰڴٰ Ͱ ޸ ν ƴ.

ľû ڴ "̹ ҺڽùθӰ Ҿ ȭǰ ǥ ν ϰ 10~20븦 ߽ 'ȭǰ ٷ ˰ ϱ' ȭǰ ķ ϰڴ" .

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: 5 걳 
: ȭǰ Ҹ,