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We investigate transformaitons on the group manifold element and gauged fields
on two different kinds of gauged WZNW models and thus obtain a duality-like
transformation between chiral-and vector-gauged WZNW models with null gauged
subgroups that exactly converts the chiral-gauged WZNW action to vector-gauged
WZNW action and vice versa. These duality-like transformation correspond to
the duality in Riemannian globally symmetric spaces.
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