q=protel+99+for+windows%E5%9C%A8%E7%94%B5%E8%B7%AF%E8%AE%BE%E8%AE%A1%E4%B8%AD%E7%9A%84%E5%BA%94%E7%94%A8&searchType=standard&isFacet=true&view=standard&rows=10&sortWay=score&sortOrder=desc&curlibcode=HZQ&searchWay0=marc&logical0=AND
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protel 99 for windows在电路设计中的应用