purchase of works for half yearly (01/07/2022-31/06/2023) basis regular cleaning service for cleaning of office building (manager office administration office plant office power house 12 security office hospital school cargo office stores) mosque bidyut bhaban vip rest house reception common area toilet block corridor stair of all floors all toilets ment & car parking area and full residential area all toilets ment and outside surrounding area including roof top (both sides) of the khsbpdb kaptai (dm-1) (lot-1)