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open timbering |
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open timbering [′ō·pən ′tim·bə·riŋ] (mining engineering) A method of supporting the ground in a mine shaft or tunnel; supports are several feet apart, with the ground between them secured by struts. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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