Bearing Softening Point
베어링 연화,용화
http://www.msdkr.com/news/articleView.html?idxno=10235
https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/barden/brochure_2/downloads_24/barden_bearing_failures_us_en.pdf
https://www.evernote.com/shard/s353/sh/512b93a9-f070-ca93-2704-6b141697b2f6/1bab8e6d0cce8bf32e645b47536acf2d https://www.evernote.com/shard/s353/sh/512b93a9-f070-ca93-2704-6b141697b2f6/1bab8e6d0cce8bf32e645b47536acf2d