Generally, the blank in the lower right corner of the drawing is stamped. If there is no blank in the lower right corner, the position can be adjusted appropriately, but the principle is that the completed seal can be exposed after the overlapping diagram is completed.

After the completion of the stamp size is generally 50mm*80mm, stamped with a red seal. The signature must be handwritten, not stamped. The basic contents of the completion stamp should include: the completion drawing is written by the construction unit, the auditor, the technical director, the writing date, and the on-site supervision director of the supervision unit. Engineering drawings with different formats should be folded into exposed A4 format (297mm 2 10mm) icon columns according to the Technical Drawing Folding Method (GB/ 10609.3 89).