The Pre-Shipment Inspection (PSI) is one of many types of quality control inspections conducted by . This inspection is done according to standard QC Test, or based upon customer requirements. Samples are selected and inspected for defects at random, according to these standards and procedures. For us, Pre-Shipment Inspection is an important step in the quality control process and is the method for checking the quality of cooling thermostat before they are shipped.

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