Nov 14 () - Fitch Ratings has affirmed the ratings of Bio-Rad Laboratories, Inc. (Bio-Rad), including the 'BBB-' Issuer Default Rating (IDR). The ratings apply to approximately $733 million of debt at Sept. 30, 2012. The Rating Outlook is Stable. A full list of rating actions is provided at the end of this release. KEY RATING DRIVERS --Bio-Rad's stable operating profile and cash flows are supported by a high proportion of recurring revenues; --Given Bio-Rad's large exposure to the Eurozone,