... with a large bending machine bending forming, straightness error is less than 0.05%, the design of pole ... there are defects in the repair, repair welding is completed, and then repair and grinding, grinding and automatic ... and blank bar ends: < + 2mm. Blank rod straightness error is less than, less than 1.5 / 1000. 6 ... seat is welded in the middle of the door, error is less than or equal to + 2mm, keep ...