tender for annual maintenance without materials of servicing of all dg sets under handernagore municipal corporation-1 servicing of all dg sets by deputing 4 nos highly skilled labours [ 4 nos*1day* 12months] 2 servicing of all dg sets by deputing 8 nos skilled labours [ 8 nos *1day* 12months ] 3 servicing of all dg sets by deputing 8 nos semi skilled [ 8 nos *1day* 12months ] 4 servicing of all dg sets by deputing 16 nos unskilled labours [ 12 nos *1day* 12months]