%0 Journal Article %T άÉúËØB12ѨλעÉäÖÎÁÆÓ¤Ó×¶ùÇï¼¾¸¹Ðº56ÀýÁÆÐ§¹Û²ì %A ºØÑÓ %A ³Â½ðÉý %J - %D 1994 %U http://journal08.magtechjournal.com/Jwk_wjyx/CN/abstract/abstract7553.shtml