supply of three type windows in lhb ac coaches.three type windows in lhb ac coaches.,lavatory window with fixed louvers and sealed glass unit for lhb coaches, as per drawing: lw54188 alt a and follow design office l.no. md35131 dated 26/1 2/2022. packing instruction: pi168 ver 4.0 or pi193 ver.1.0. [ warranty period: 30 months after th e date of delivery ] ] , fixed window for lhb coaches, as per drawing: lw54137 alt c and follow desi gn office l.no. md35131 dated 26/12/2022. packing instruction: pi168 ver 4.0 or pi193 ver.1.0. [ warranty period: 30 months after the date of delivery ] ] , emergency openable window, as per drawing: lw54138 alt d and follow design office l.no. md35131 dated 26/12/2022. packing instruction: pi168 ver 4.0 or pi193 ver.1.0. [ w arranty period: 30 months after the date of delivery ] ]