The meaning of the Acronym RFF is...

RFF is

• Raised Face Flange

More Meanings For RFF:

• Resources For the Future
• Royal Feature Films
• Resources For the Future
• Raised Face Flange
• Reading For The Future
• Rockefeller Family Fund
• Religious Freedom Fund
• Required Form Feed
• Racor Filter Funnel

RFF is also in:

• Educational
• Firms
• General
• Non-Profit Organizations
• Products
• Transportation
• Universities