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<title><![CDATA[EC21 Product Catalogs - quartz tube.]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/quartz_tube.--2644/1/quartz tube..html]]></link><item>
<title><![CDATA[HW Diamond Casing Shoe]]></title><link><![CDATA[https://csdrilling.en.ec21.com/HW_Diamond_Casing_Shoe--8382535_9987706.html]]></link><description><![CDATA[quartz porphyry
HRC20~25
Extreme hard
Medium to low
Silicious stone, hard sandstone
HRC10~20
Ultra hard
Low
Rhyolite, dense quartzite, iron stone
Other Size Available
Q Series
AQ, BQ, NQ, HQ, PQ/AQTK]]></description><pubDate><![CDATA[20160523]]></pubDate></item>
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<title><![CDATA[Diamond Impregnated Bits, Diamond Core Bits, Impregnated Bits AQ BQ NQ HQ PQ]]></title><link><![CDATA[https://gzvilong.en.ec21.com/Diamond_Impregnated_Bits_Diamond_Core--10772805_10772810.html]]></link><description><![CDATA[tube. Drilling of 1200 to 1800 metres is common and at these depths, ground is mainly hard rock, so diamond drill rigs need to drill slowly to lengthen the life of drill bits and rods, this drilling ]]></description><pubDate><![CDATA[20210520]]></pubDate></item>

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