Tender For providing of annual maintenance services for water purification and conditioning system (version 2) - potable water purification system reverseosmosis or uv based; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, ..,annual maintenance service - photocopier machine - photocopier machines ( monochrome , laser , separate drum & tonner, mid range); hpe; any service provider,annual maintenance service - desktops, laptops and peripherals - ups (offline 600-650 va); acer,annual maintenance service - desktops, laptops and peripherals - desktop pc; hp,annual maintenance service - desktops, laptops and peripherals - desktop pc; acer,annual maintenance service - desktops, laptops and peripherals - desktop pc; dell,annual maintenance service - desktops, laptops and peripherals - laptop; dell,annual maintenance service - desktops, laptops and peripherals - printer ( monochrome , laser , separate drum and tonner ); hp,annual maintenance service - desktops, laptops and periphera