Bangkok Expressway and Metro Public Company Limited (BEM) welcomed a group of Associate Professor Dr. Boonchai Sangpetngam and students from Faculty of Engineering, Chulalongkorn University. On the occasion of visiting to the operation of MRT Chaloem Ratchamongkhon Line (Blue Line) for enhance knowledge of MRT maintenance work both in theory and practice and be able to apply the theories studied in the curriculum.