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<title><![CDATA[EC21 Product Catalogs - rollerball]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/rollerball--073301/1/rollerball.html]]></link><item>
<title><![CDATA[How Do You Install A Door Sensor?]]></title><link><![CDATA[https://qinuoelectronics.en.ec21.com/How_Do_You_Install_A--11260537_11383888.html]]></link><description><![CDATA[Rollerball: In this setup, you install rollerball sensors in the recessed parts of door frames. Closing the door causes the hinged edge to depress the ball, closing the circuit.
Overhead (garage door]]></description><pubDate><![CDATA[20210518]]></pubDate></item>

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