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Are the material seal sample confirmation form and supervisor's name certified?
The Confirmation Sheet of Material Sealing Sample needs the supervision opinion and is signed by the director.

The confirmation sheet shall include: the opinions of the project management department and the signature of the project manager; Supervision opinion and signature of the director; Manage the opinions of the company and the signature of the project manager; Opinions of the design department and signature of the person in charge; Opinions and signatures of representatives of infrastructure center.