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Akiles DuoMac 321 Wire Binding Machine
Amazon.com : Akiles ADM-C51 Model DuoMac-C51 2-in-1 Combo Binding Machine, 5:1 Pitch Coil with Built-in Comb Opener (1/4" to 2"), 20 Sheets Single Punching Capacity (20 lbs Paper), All Metal Construction :
Akiles DuoMac C31 Comb Binding Made Easy Demo - YouTube
Akiles DuoMac Product Demo - YouTube
Akiles DuoMac 321 2:1 and 3:1 Pitch Wire Binding Machine – Printer's Parts & Equipment -USA