"Delivery, Installation, Commissioning And Warranty Service Of Computer Equipment And Accessories, Including Stem, In The Areas Of "Design And 3D Prototyping", "Mathematics And Informatics" And "Stem" For The Construction Of A Stem Center In "Hristo Botev" Primary School, Rakovski, According To The Procedure Of The Recovery And Sustainability Mechanism Bg-Rrp-1.015 "School Stem Environment" Under The National Education And Training Program