TUNNELS (HINDI)

Tunnels - definition and purposes explained in hindi .
Videos on geology and physics are available for college students .
playlist links -
1.Stratigraphy - https://www.youtube.com/watch?v=LiWfj...
2.Hydrology and groundwater -https://www.youtube.com/watch?v=URpGo...
3.Ore mineral deposits - https://www.youtube.com/watch?v=R0DgB...
4.Palaeontology - https://www.youtube.com/watch?v=VYzkr...
5.Physical Geology - https://www.youtube.com/watch?v=giJ4i...
6.Petrology - https://www.youtube.com/watch?v=boyCr...
7.Crystallography and mineralogy - https://www.youtube.com/watch?v=PAuwP...
8.Structural and field geology - https://www.youtube.com/watch?v=zgazc...
9. Bsc physics - https://www.youtube.com/watch?v=y4-ox...