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<title><![CDATA[EC21 Product Catalogs - string ball]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/string_ball--2673/1/string ball.html]]></link><item>
<title><![CDATA[API Oilfield Wellhead Annular Blowout Preventer/BOP]]></title><link><![CDATA[https://machinery14.en.ec21.com/API_Oilfield_Wellhead_Annular_Blowout--9182239_9182250.html]]></link><description><![CDATA[string or seal off the well. 
3) Main specification 
Standard: API16A 
Bore size: 7 1/16&amp;mdash;21 1/4&amp;rdquo; 
Pressure: 2000-10000psi 
There are A type (cone gum core )annular BOP and D type(ball gum]]></description><pubDate><![CDATA[20140912]]></pubDate></item>

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