About hard-metal.....?!

Question: About hard-metal!.!.!.!.!.!?

this who thought the first group of hard metal and who they were the songs hard-metal exponents!?!?!?Www@Enter-QA@Com

Answers:

Black Sabbath - Iron Man, Supernaut

http://www!.youtube!.com/watch!?v=44hNwWCKg!.!.!.Www@Enter-QA@Com

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