bids are invited for cng booster compressors-item 1.1 of mr , installation, commissioning and field performance test-item 2.1 of mr , per diem rate towards extra visits -item 2.2 of mr , re- transportation from stores to unloading at site -item 2.3 of mr , annual operation, repair and comprehensive maintenance charges for 1st year -item 3.1 of mr , annualoperation, repair and comprehensive maintenance chargesfor 2nd year -item 3.2 of mr , annual operation, repair andcomprehensive maintenance charges for 3rd year -item 3.3of mr , annual operation, repair and comprehensivemaintenance charges for 4th year -item 3.4 of mrprocurement of cng booster compressors for cgd total quantity : 51