Package: The package of the unit is the package of the whole machine. The spare parts and accessories shall be separately packed. Temporary anti-rust protection measures shall be taken for exposed metal surfaces that are not coated or electroplated before packaging the units and accessories, and the whole packing case shall be firm and reliable, the packing case shall be clearly painted with the product model, specification, packing list, and random technical documents to be placed in obvious position in the packing box