A circular manhole cover with a metal plate and the inscription "M.P.Z.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S.A.S