repairing and maintenance of computers , scanners , ups , printers and refilling of cartridges of all types of printers in the area of eudd-x under the jurisdiction of eudc-iii gzb . , annual and emergency maintenance of desktop ( monitor , cpu , mouse , keyboard , motherboard , software , hard disc etc . ) including replacement of all other parts & labour charge etc . for the period of 01-04-2021 to 31-03-2022 . , annual and emergency maintenance of printer including replacement of printers teflon & all other parts & labour charge etc . for the period of 01-04-2021 to 31-03-2022 . , annual and emergency maintenance of printer with scanner including replacement & all other parts & labour charge etc . for the period of 01-04-2021 to 31-03-2022 . , annual and emergency maintenance of ups including replacement of all other parts & labour charge etc . for the period of 01-04-2021 to 31-03-2022 . , annual and emergency maintenance of laser printers cartridge including refilling work , drum , blade and all other parts etc . & labour charge etc . for the period of 01-04-2021 to 31-03-2022 .