The 97 is conventional lands and grooves.
As far as I know, the ONLY CZ with a polygonal barrel is the standard CZ-82, and the CZ-83 in 9x18 - which is no longer imported to the U.S. (Other calibers for the CZ-83 may also be polygonal-barreled, but I think they are conventionally-rifled barrels, too.)
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