| http://www.w3.org/ns/prov#value | - surfaces of the copper and aluminium specimens.The defects range in size from 5 to 25 microns and are similar to those found in sliding components such as parts in automotive engines, compressors and numerous types of equipment and machinery.???In the past we only saw these features after they had formed, and we attributed them to various possible mechanisms,??? he said. ???Here, we show a mechan
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