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"DAP is expressed in Sievert square centimetres (Gy*cm²)[1] (sometimes mGy*cm² or cGy*cm²)." - not sure what this means. The sievert and the gray are similar, but not exactly the same. Which is this? The units do not match the words. MergatroidGonzales ( talk) 19:26, 22 December 2010 (UTC)MergatroidGonzales reply