lecture 13 : drilling pattern-2 Published 6 years ago โข 12K plays โข Length 31:23 Download video MP4 Download video MP3 Similar videos 24:17 lecture 15 : special drilling methods-ii 34:59 lecture 02 : introduction to blasting technology 13:11 drilling operation in mining [full concept] 0:29 thatโs why iit,en are so intelligent ๐๐ #iitbombay