Title: Kŭmsok yŏl chʻŏri kisul kaepʻyŏn e kwahan kyehoek pogosŏ mit saŏp kyehoekan
Subjects: Heat treatment, Hanʼguk Yŏl Chʻŏri Sanŏp Kihoegwŏn, Metals, Han'guk Yŏl Ch'ŏri Sanŏp Kihoegwŏn