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<title><![CDATA[EC21 Product Catalogs - oi]]></title>
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<title><![CDATA[Oil Well Water Well Drilling 5inch 20ppf Oil Casing Carbon Steel Pipe]]></title><link><![CDATA[https://zhuyan230401.en.ec21.com/Oil_Well_Water_Well_Drilling--11826223_11829234.html]]></link><description><![CDATA[Oi casing is the lifeline to maintain oil well operation. Because of the different aeolodical conditions.the stress state of underground is complex, and the comprehensive action of tension, compressi]]></description><pubDate><![CDATA[20230803]]></pubDate></item>

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