Tʻanʼgwangyong chŏnʼgi kigi ŭi pangpʻok kujo e kwanhan yŏnʼgu =
Subtitle: Study on explosion-proof construction of electric instruments and apparatus for coal mine
By: No Se-hwan ... [et al.].
Series: Yŏnʼgu tʻŭkpo = KIER bulletin ; 26
Publisher: Hanʼguk Tongnyŏk Chawŏn Yŏnʼguso
Published: 1981
Language: kor
Number of pages: 56