Tenders for Custom Bid For Services - Overhauling Charges For Ccb Ii Brake System Valves Make Knorr Bremse Provided In 3 Phase Electric Locos Including Provision And Changing Of Must Change Spares And Conditional Basis Spares 06 No Custom Bid For Services - Optional Items To Be Replaced On Conditional Basis Overall Ceiling Limit 12 Percent Of Total Estimate Cost For Overhauling Cost Lumpsum Custom Bid For Services - Gst 18 Percent