Mumbai, Dec. 9 -- The Mumbai Metro Rail Corporation (MMRC) is set to complete 100% tunnelling work between Marol Naka and Seepz - as part of the 33.5-km Metro-3 corridor - by December 12. Around 2,500 workers and more than 350 equipment are at work on the 7.09-km Marol Naka-Seepz stretch, which will be the first of the seven packages of the underground Metro corridor to be completed....