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<title><![CDATA[EC21 Product Catalogs - nano2]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/nano2--0766/1/nano2.html]]></link><item>
<title><![CDATA[Blackening Coating]]></title><link><![CDATA[https://richconncnc.en.ec21.com/Blackening-Coating--11822649_11822659.html]]></link><description><![CDATA[Put the metal parts into the solution of NaOH, NaNO2 and other potions. At a certain temperature, the parts will react chemically to produce a thin blue (black) oxide film. Blackening can be divided ]]></description><pubDate><![CDATA[20230721]]></pubDate></item>

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