repair & overhauling 132kv sf6 circuit breaker, 12kv trolley and rectification of oil leakage in single phase 220 / 132kv power transformers installed at various ehv sub-stations under electrical system division, hpsebl, hamirpur-service charges for rectification of gas leakage in 132kv sf6 circuit breaker ( r-phase pole ) of make m / s siemens & conecting pipes of all the 3 poles ( r, y & b ) installed at 132 / 33 / 11kv sub-station, anu, hamirpur by providing o-ring, gaskets, special anti-leakage paste i.e. anabond, grease etc. complete in all respect as per direction of engineer-in-charge. 2 crane charges for items no. 1 above for 2days. 3 repair & overhauling of 12kv vcb trolleys of make mei installed at 33 / 11kv sub-station, mattansidh, including operating mechanism, axle rod, motor auxiliary switch complete in all respect as per direction of engineer-in-charge. 4 service charges for rectification of oil leakage in oltc of 220 / 132kv single phase power transformers of make crompton greaves by providing gaskets, o-ring installed at 220 / 132 / 33 / 11kv sub-station, hpsebl, mattansidh, hamirpur, complete in all respect as per direction of engineer-in-charge.