Annual Maintenance Contract For Providing Support Staff In Operational Area For Operating Hand Held Machine ( Bush / Grass Cutter And Tree Pruning ) For The Year March 2021 To February 2022 At Jpni Airport , Patna . Annual Maintenance Contract For Providing Support Staff In Operational Area For Operating Hand Held Machine ( Bush / Grass Cutter And Tree Pruning ) For The Year March 2021 To February 2022 At Jpni Airport , Patna