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Tunnelling complete on deepest stretch of Phase-IV Golden Line
"The work on another parallel tunnel between Chhatarpur Mandir and IGNOU was completed on Feb 25 this year. Therefore, tunnelling work on both the up and down lines has now been completed on this ...
The Pioneer20d
DMRC completes Phase-IV tunnelling for underground tunnel on Golden Line
The Delhi Metro noted that work on a parallel tunnel between Chhatarpur Mandir ... With the latest breakthrough, tunnelling for both up and down lines has now been finished.