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1951 б ϰ ̱ ƮϾ п (1980) ݷζ (Colorado School of Mines) ڿ ڻ(1983) ޾Ҵ. ̱ ÷ Post. Doc. ̿(IONA) 濵ýа б а ִ.

ѱбѸ ȸ, ѱѸ ȸ̸ ѱڿȸ ȸ, ܱ ڿ η Ͽ. ʴ б° ż嵿» , ̰ , бѸ ź ż å ȹϰ Ͽ.

ڿ, , å, å о߿ ִ. ϴ ڿ åԾڷ Ȱϸ鼭 λ ϰ Ǿ, а ̷ ϰ ִ. ̴ ̴. , , б() ƿ츣 й å η ̷ ʿ ϰ ִ. , ڿ, о߿ ǥ, ǥδ¡ ǡ(2012), ڸ ȭѶ(2009) , δ¡ڿ 衷(2002),Ȳ ,,(1993) ִ.

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