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Rz to Ra equivalent

What means RZ 8 - 12? Are there is Ra equivalent to RZ8-12?

David Komiyama
- El Paso, Texas
2003

No. Rz and Ra are not the same and it does not have a constant conversion factor; however, a rough guideline is 4:1 Ra:Rz

AF Kenton
retired business owner - Hatboro, Pennsylvania
2003

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