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<title><![CDATA[EC21 Product Catalogs - tracking collar]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/tracking-collar--2644/1/tracking collar.html]]></link><item>
<title><![CDATA[API Standard AISI 4145H Mod 6-1/2]]></title><link><![CDATA[https://senwell2008.en.ec21.com/API-Standard-AISI-4145H-Mod--9714769_9714838.html]]></link><description><![CDATA[Usage:Drill collars are used to provide weight on bit so that drill pipes are kept in tension. Especially drill collars can keep drill bits centralized and hole track by large rigidity
Material: AISI]]></description><pubDate><![CDATA[20170304]]></pubDate></item>

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