Structural parts: material, surface roughness, tolerance, surface treatment, straightness (or radian)
Connection: hole deviation, bolt grade; welding method, welding standard, welding material; need for confidentiality, non-destructive inspection, liquid penetration inspection, etc. Overall structure: verticality, horizontality, etc.
Packaging: Packaging materials, packaging methods.
Warehouse: ambient temperature, ambient humidity.
Shipping: unloading, putting in a car, in a container, etc.
