Coal
the process of making coal and oil
image text translation (1)National Defense TV Yeokjeon Cafe(2)Explanation Chae Seung-byung, PhD in Physics from KAIST(3)Yeoksan Dabang Mini Ilseoktan vs(4)estimated to …
the process by which coal and oil are made.jpg
image text translation (1)National Defense TV Yeokjeon Cafe(2)Explanation Chae Seung-byung, PhD in Physics from KAIST(3)It is estimated to have been …