Tenders for Supply of Rotary Switch For Cab Heater/Cab Fan As Per Clw Spec No Clw/Es/3/0108 And Abb Document No Hbtb585580r5022. Note 1 : This Item Is Reserved For Clw Approved Suppliers Only.As Per Clw Master List No: Clw/Mlas/3 Phase .Version 25.0 Page; 11 Of 83, Sl.No.75. 2 Firm Should Submit Authorised Dealership Certificate Along With Tender Make: Schaltbau Or Spring Ag /Swz Or Patra & Chanda Only.