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Redbelly98
#15
Mar28-12, 05:32 PM
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Quote Quote by chikis View Post
What do you mean by Rn?
Don't be afraid of trying google for basic information like that:
https://www.google.com/#hl=en&safe=o...w=1280&bih=638

or

https://www.google.com/#hl=en&sugexp...w=1280&bih=638

(A lot faster than waiting 10 hours for somebody to post an answer to your question.)