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    Where Can I Find a Complete Chart of ASTM Grain Size Numbers?

    thnaks for attetion :) its very useful... :D thanks...
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    Where Can I Find a Complete Chart of ASTM Grain Size Numbers?

    ı have a little problem for this problem i found 2 different answer... Question:İf there Are 400 grains per square inch on photomicrigraph of a ceramic material at 200x.What is its ASTM grain-size number...? Thanks for your attention...
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