Title: Chŭnggi palsaenggi unjŏn chung palsaeng hayŏ kŭpkyŏkhi chinhaeng toenŭn pijŏngsang mamo ŭi chaehyŏn sirhŏm ŭl tʻonghan chŏngsangjŏk in pʻŭretʻing mamo wa segwan sumyŏng kwa ŭi kwanʼgye e kwanhan yŏnʼgu =
Subjects: Steam-boilers, Pressure gages