bids are invited for custom bid for services - introduction of cylinder , custom bid for services - replmnt of o ring , custom bid for services - adjustment of cylinder , custom bid for services - soap solution , custom bid for services - amc mechanical maintenance , custom bid for services - extra hour service unskilled , custom bid for services - extra hour service semi skilled , custom bid for services - extra services skilled , custom bid for services - provide office assistance serv plant , custom bid for services - provide office assistance serv ro , custom bid for services - hiring higly skilled manpower , custom bid for services - fillng of 425 kg cyl daily 2 per shift , custom bid for services - emergency breakdown visit , custom bid for services - hiring of hydra crane , custom bid for services - assistance to ph operator