(LEAD) (Olympics) S. Korean golfer rues poor ball-striking in up-and-down round
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By Yoo Jee-ho
RIO DE JANEIRO, Aug. 12 (Yonhap) -- South Korean Olympic golfer An Byeong-hun rued poor ball-striking in his up-and-down second round at the Rio de Janeiro Games Friday.
An said it was particularly disa