17
19 PF ȯ
,
ﳪ ε, ƴ ݿ ļ ϴ.
1/17 ׳ .
δ 60Ǵ 80 ɰŰ
̰ ε Ѵٴ° .
ɷ . 1/3 å Ѽ
ü
δ Ҽִ ߽ϴ
̷ ϸ.........
60θ 70 75%̻ ϴ.
ɷµǸ ϴ° ɷ¾ȵǴµ ʳ ϰ ߴٰ
1/17 ׳ .