  Let K and K' be 2-knots. Suppose that K and K' are ribbon-move equivalent.
Then the Farber-Levine pairing for K is equivalent to that for K' and the
(Z-)torsion part of the first Alexander module of $K$ is isomorphic to that of
K' as Z[Z] modules.
  Let K be a 2-knot which is ribbon-move equivalent to the trivial knot. Then
the Atiyah-Patodi-Singer-Casson-Gordon-Ruberman Q/Z-valued
\widetilde\eta-invariants of K for Z_d is zero. (d is a natural number. d>2.).
