a troy ounce, weighing 1 12 of a troy pound, or 480 grains, or 31.1035 grams

listen to the pronunciation of a troy ounce, weighing 1 12 of a troy pound, or 480 grains, or 31.1035 grams
a troy ounce, weighing 1 12 of a troy pound, or 480 grains, or 31.1035 grams
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