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4420 Synchronous Double-Needle Sewing Machine
Three-synchronized comprehensive feed double-needle heavy-duty sewing machine
The 4420 twin-needle synchronous machine adopts a triple-synchronous integrated feeding system, providing even fabric feeding and strong feeding power. It can easily handle sewing of medium to thick materials like leather, bags, sofas, car interiors, canvas, and more. The whole machine uses a high-strength cast iron body, ensuring stable operation and strong shock resistance, effectively reducing vibration and noise during long-term work. It comes with a large rotary hook design, which reduces t