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5.3 Material
5.3.1 Receiving inspection of material shall be in accordance with the following requirements:
1 Quality certificates of materials shall be checked，the model，specification，quantity and performance of materials shall be in accordance with requirements of design documents and records shall be made；
2 Recheck shall be made according to provisions if required by design documents.
5.3.2 Unqualified materials shall not be used and shall be marked and stored in the unqualified product area.