BOGIE FRAME ASSLY. FOR AIR SPRING LHB NA [ BOGIE FRAME ASSLY. FOR AIR SPRING LHB NAC COACHES- ( QR Code as per CDE/ RCF Letter No. MD44121 DT. 24. 11. 2021. ), as per Drawing: LG03001 ALT. e & MDTS 213 REV. 04 and SME/ S & BD s letter no MD 44121 Dt. 23/ 06/ 2021 for Identification ]