ذ ̺оƮ ϴ εȸ(CR) 켱 ְ Zǰ 츮 ƴ. Ư ̹ CR Űϴ ̺оƮ ߿ , , ϻ, õ 4̳ Եƴ.
ð 6 ذ ̺оƮ ϴ CR ְ ȼ , Z, , 츮, ձ 5 Zǰ 츮 켱ڷ ߴٰ .
Zǰ 츮 Ǽκ Խû 31 8000 ߺû ϰ 21 6000 Դ Ȯƴ. Ư 21 ߿ , , ϻ, õ 4 Եư, ߿ ʰ ־ Ÿ.
켱 ְ簡 ʿ ְ ֱ ݾ 뺸 ̸ ֵ ȹ̴. ٸ ú Ǽ ε å߰ ؾ ð ɸ ƴ.
̹ ְ ϰ Ǹ CR ְ ð ȴ.
ְ ڴ "̹ 켱 ְ , ڱں, ̾" " ȮǸ ǻ簡 Ǽ ڿ CR Ϸ ȹ"̶ ߴ.
ְ ذ ̺о翡 ϴ CR ǰ ø ̹ ϰ ̴ ȿ ̺о ݵ ְ縦 ̴.