| http://www.w3.org/ns/prov#value | - member in such a manner as to bring said portion of said masking tape into contact with said second surface of said workpiece to cover the same; (c) subsequently operating said abrasive grain blowing means to blow said abrasive grains against said workpiece to process said first surface of said workpiece; (d) subsequently stopping said abrasive grain blowing means to cease blowing said abrasive gr
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