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