???? ?????????? ?????????????? ???????? ????? ???? ???????? ?????????? ??????? ?????????? ????, ??????????? ???????????? ?-?????? ???????????? ?????????????????? ?????????? ????????? ?????? ?????? ??????? ??????????? ?????? ????? ?? ??? ???? ??????? ??? ??? ??? ????? ????? ?????????? ???? ?? ????? ????? ??????? ????? ?????Permit Bangladesh Survey A