procurement of brake block (brake lining), locking block for the use of track machines.,locking block as per plasser part no. hy155.13 and sub part no. hy155.01, make : plasser imp or its equivalent ] , brake block as per plasser part no : wn146-850.k-5; make : plasser imp or its equiv alent ] , brake block (brake lining) plasser part no. wn146.730.k3, make :- plasser imp or equivalent ] , brake block (brake lining) as per plasser part no. wn146.900-k2/k3, make : plasser imp or its e quivalent ] , brake block (brake lining) as per plasser part no. wn146-920k-1a and substitute part no. w n146-920-k-1, make : plasser imp or its equivalent ] , brake block (brake lining) as per plasser part no. wn146.920-k3/k3a/k-9, make : plasser imp o r its equivalent ] , brake block, as per plasser part no.wn.146-730-k1, make: plasser imp or its equivalent indi an make/brand. ]