Tender For providing of operation and maintenance power house / power plant - biennial mechanical maintenance work of duct, damper, gate, expansion joins,operation and maintenance power house / power plant - biennial mechanical maintenance work of duct, damper, gate, expansion joins,operation and maintenance power house / power plant - biennial mechanical maintenance work of duct, damper, gate, expansion joins,operation and maintenance power house / power plant - biennial mechanical maintenance work of duct, damper, gate, expansion joins