CNC Hollow Riveting Machine 1 For riveting round head, 2 empty heart riveting. 3 feed control installment CNC Hollow Riveting MachineA, for riveting ... continuous riveting, high efficiency.C, running without operator contact with rivets, safety greatly improved.D, high-performance material clamp and ... of assembly-line, greatly improving production efficiency. hydraulic ZKM6 CNC Hollow Riveting Machine