The validity period of on-board inventory and the scrapping period beyond the limit of inventory shall be calculated from the date of production of materials supplied by the manufacturer. If the inventory is beyond the validity period, it should be re inspected or tested by IQC before it can be used by ordinary customers. The material re inspection items shall include the environmental hazardous substances test, which shall be implemented in accordance with the incoming inspection standards. If the raw materials exceed the effective period of inventory, they will be transferred to the isolation area, locked and stored separately for control and transferred to ordinary customers.
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