标题： ENGINEERING DATA REQUIREMENTS The SUPPLIER shall furnish manufacturer's Material Test Reports showing actual results of Chemical Analysis and Mechanical Tests in compliance with the reference specification. The test reports shall be traceable to each component through legible paint stencilled heat numbers of equivalent. The documents shall be identified with Company's Purchase Requisition number and Item Code Number and shall be signed by the manufacturer's authorized agent. The requirements for documentation are as per attachments to the requisition. 以上文字中，我不理解红色部分表示什么意思，谁能来解释下？谢谢！
