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̴ 5 1,000 ŭ ȣ Ҵ ڷγ19 һ 3(ѵ, ſ, ) Ưڱݡ Ȯ , λ һ(21.6.30 â) Ѵ.
Ưڱ ϴ ű ڱ(ü 1õ ) λſ뺸ܿ ѵ ɻ (ѵ), ſ ϰ(ſ), 1Ⱓ ڷ Ǹ, ȯ 1 ġ 4 ſݱպһȯ ߵȯ ᰡ . ÿ ʱ 1Ⱓ װ 2~5 0.8% ڸ Ѵ.
湮 ̳ ûϸ 2~3 ̳ Ǵ ý, û û Ӵ༭ ø ȴ. , λ Ǵ 湮 û ϴ.
κ һ ̿밡ϳ, һ 3 Ưڱ ü, ֱ 3 ̳ ſ뺸 űԺ Ҵ ü, üззȸĻ ſ뺸 ߾ȸ 纸Ѿü, ޡü, ſ뺸ݰ ÿ ü ̹ Ưڱ ̿ .
λ ڷγ19 ȭ ذ ū һε ̹ Ưڱ 濵ȸ ̳ DZ ٶ١, ε λ ֿ켱 һε ϻȸ پ å ϰڴ١ .
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