| http://www.w3.org/ns/prov#value | - Preferred embodiments include copper and tin powders such as may be used as bonds for grinding wheels, e.g., Alcan Grade MD 201 or MD 301 copper powders typically having an average particle size of about 9 and 8 microns, respectively, and Alcan Grade MD 201 or MD 301 tin powders typically having an average particle size of about 12 microns.
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