Blanking technology: laser, tower punching, flame, plasma, roll forming and numerical control bending technology

Welding process: argon arc welding and gas welding spot welding or broken welding.

Rust removal process: the whole box pickling to remove oil, decontamination to enhance the surface adhesion of the paint.

Coating process: the inner wall is treated with epoxy resin asphalt paint and the box is painted

Assembly process: the moving parts should move freely, no interference stuck phenomenon, no abnormal sound, fastener loosening phenomenon.