supply of manpower for round the clock operation of six nos . in-motion weigh bridges of btps for two years with a provision of six month extension . , supply of manpower for round the clock operation of six nos . in-motion weigh bridges of btps for two years with a provision of six month extension . , labour cost for round-the-clockoperation of 06 nos electronic in-motion weigh bridges atrailway yard , btps , cost of ppe ( 01/09/2020-31/08/2021 ) , cost of ppe ( 01/09/2021-31/08/2022 ) , cost of liveries ( 01/09/2020-31/08/2021 ) , cost of liveries ( 01/09/2021-31/08/2022 ) , gst