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    { "id" : "http://webisa.webdatacommons.org/prov/137300572"
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        "http://www.w3.org/ns/prov#value" : [ "Another aspect of the present invention is a method of manufacturing a magnetic recording medium, which method comprises: texturing a surface of a glass or glass-ceramic substrate with a pulsed, focused laser light beam to form a plurality of protrusions on and extending above the substrate surface; and controlling the height of the protrusions by heating the substrate to reduce the quench rate du" ] ,
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