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colsu vitric bacid
TUff can be used for construction. it dependes what tuff it is. there are many out there i.e. volcanic ash\ go on wikipedia.org and seach tuff
Tough is the same as rough; tuff means cool (ex:a tuff looking Mustang or a tuff record)
"Tuff" in Spanish is "toba"
Tuff Enuff was created in 1985.