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circuit main |
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main 1. In an air-conditioning system, a major duct or pipe for distributing to or collecting from various branches. 2. In any system of continuous piping, the principal artery of the system to which branches may be connected. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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