Quality assurance inspection of raw materials, welding wire and other raw materials; mainly refer to the content of the quality assurance document to inspect the specifications, appearance, and trial of the materials
The quality certificate inspection of raw materials, welding wire and other raw materials, mainly refers to the contents of the warranty document to test the specifications, appearance and trial of the material
Inspection of quality guarantee of raw materials, welding wire and other raw materials; mainly refer to the quality guarantee to inspect the specification, appearance and trial use of materials