Tube Investment Standalone December 2018 Net Sales at Rs 1,340.75 crore, up 14.35% Y-o-Yhttps://www.moneycontrol.com/news/business/earnings/tube-investment-standalone-december-2018-net-sales-at-rs-1340-75-crore-up-14-35-y-o-y-3485741.html#TIINDIA