#map Major oil refineries in India Digboi Bongaigaon Noonmati Numaligarh Koyali Haldia Vizag Kochi Mangalore Chennai Trombay Jamnagar Paradeep Ratnagiri Vadinar Tatipaka Nagapatnam Mathura Karnak Bina Panipat Bhatinda Join @Mapping_India_World_upsc 485 views14:02