... milling, rolling, stamping, mouth-narrowing/broadening, hole/bore-making, surface-grinding, mouth-broadening, mouth-shrinking, bending,sharpening ... rest easy.C. It's aluminum alloy bent pipe, good for many ways, for example: housedhold, ... 50 workers.C. Equipments: CNC machines, bending machine, Automatic spark machine, line cutting machine, shearing machine,etc.D. Surface treatment: Anodizing, powder ...