longitudinal tube of pantograph to m/s sil pt.no.s 0221120101 or m/s gsec drg. no. gsec/panto/214 or m/s contransys pt.no. c 01410 or m/s concept order ref.no. 0102082 conforming to rdso spec no. rdso/2008/el/spec/0066 rev.0 dated 20.06.2008 and amend 1 dt
