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Tapping |
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tapping [′tap·iŋ]
(mechanical engineering) Forming an internal screw thread in a hole or other part by means of a tap. (metallurgy) Opening the pouring hole of a melting furnace to remove molten metal. Tapping special wounding of growing trees for the purpose of obtaining essential oils, resins, raw rubber, and sugar syrup. The tapping of rubber trees is the most developed form of tapping in world economy. In the USSR the tapping of pine trees is commercially significant. To a small extent the nut pine Pinus Sibirica and the fir are tapped, and a very valuable balsam used in optics is obtained. In the USSR in the southern Urals and Byelorussia, birch and maple are tapped for their sugar syrup. 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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