商业类搜索引擎及目录索引

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电工 Electrical：

bestroute.com Electrical Web Search - Searches information from sites related only to the electrical, voice, data industry.

ElectricalSearch - Find information about the electrical marketplace. Over 800 Web sites relevant to the electrical industry.

EEM - For engineers. Search for electronic products.

Lighting.com - Portal for lighting professionals and those involved in the lighting industry.

Lightsearch.com - Searchable directory of lighting companies, products and information resources.