Hvsl-1 &2 Programme Switch (In The Ratio 1:1) For Isolating Mvsl And Qvsl Of Wam-4/Wag-5 A/Wap-1/Wap-4 Type Locos Specification Clw/Es/S-1/Y Or Latest And Siemens Type K-138X22 Old Prog. No.- 4 A-0067-9671 Type 3La0-250-2Yw00-7Whvsl1 & 3 La0-250-2Yw00-7Whvsl2 Or Equivalent. Note- Material To Be Procured From Clw Approved Sources Or Their Authorized Dealers Only Along With Tender Specific Auth Orization Letter. ]