HF-668MA座式内线机（牛角中梭 齿轮结构）

特点及用途：

1. 适用于运动鞋、休闲鞋面与鞋底缝制（侧缝）。
   
2. 梭子类型：中梭。
   
3. 传动方式：齿轮结构传动，具有发明专利，易更换，更加耐用。
   
4. 本机使用电子马达，稳定且易调节速度。
   
5. 本机梭壳、勾线器等核心配件由日本佐文公司生产进口。
   

Features and uses:

1. Suitable for sewing sports shoes, casual uppers, and soles (side stitching).
   
2. Shuttle type: medium shuttle.
   
3. Transmission method: Gear structure transmission, with invention patents, easy to replace, and more durable.
   
4. This machine uses an electronic motor, which is stable and easy to adjust speed.
   
5. The core accessories of this machine, such as the shuttle shell and wire hook, are produced and imported by Japan's Satsuma Corporation.