Norwegian Tunneling Society
The Norwegian Tunneling Society (Norwegian: Norsk Forening for Fjellsprengningsteknikk) or NFF is a professional association established in 1963 which represents the rock blasting and tunneling industry in Norway.
The Norwegian Tunneling Society (Norwegian: Norsk Forening for Fjellsprengningsteknikk) or NFF is a professional association established in 1963 which represents the rock blasting and tunneling industry in Norway.