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<p>failures.</p>

<p><b>Preventive maintenance</b> or <b>preventative maintenance</b> (<b>PM</b>) has the following meanings:</p>

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* The care and servicing by personnel for the purpose of maintaining equipment in satisfactory operating condition by providing for systematic inspection, <a href="page.php?w=Fault_detection_and_isolation">detection</a>, and correction of incipient failures either before they occur or before they develop into major defects.<br/>
* The work carried out on equipment in order to avoid its breakdown or malfunction. It</p><p>
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