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.