Affiliation: | (1) Present address: Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Nagatsuta, Midori-ku, 4259 Yokohama, 227, Japan;(2) NTN Toyo Bearing Co. Ltd, 1380, Higashikaizuka, 438 Iwata, Shizuoka, Japan;(3) Industrial Products Research Institute, 1-1-4, Yatabe-machi, Higashi, Tsukuba-gun, 305 Ibaraki, Japan |