  We are discussing some aspects of the magnetic monopoles and cosmic strings
interactions with axion domain walss and membranes. The monopole moving through
an axion domain wall is transformed into a monopole bag - the state with a dyon
quantum number, but smaller mass. In the case of an axion membrane the passing
monopole excites the chiral charged state at the membrane boundary. It will be
shown that if cosmic string intersects an axion domain wall there will be
$\theta = \pi$, i.e. maximal $CP$-violation inside the string. Strings carrying
the flux of the $Z$-boson field become the sources of the baryon charge
nonconservation. The symbiosis of the two pictures - monopole passing through
an axion domain wall and string intersecting it - is the case of the
interaction between an axion domain wall and a Nambu electroweak string
carrying $SU(2)_{L}$ monopoles at the ends.
