Supply, Installation And Commissioning Of Aluminium Step Trolley Ladder As Per Specification Enclosed. Note: Firm Should Offer Clause Wise Compliance For The Attached Specification Else Their Offer Is Summarily Rejected.. Supply, Installation And Commissioning Of Aluminium Step Trolley Ladder As Per Specification Enclosed. N Ote: Firm Should Offer Clause Wise Compliance For The Attached Specification Else Their Offer Is Summarily Rejected.