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English

In order to maintain the proper tension, unreeling part is generally equipped with tension control device, common mechanical friction disc clutch, AC motor, magnetic powder clutch torque.

Chinese

为保持合适的张力,放卷部分一般设有张力控制装置,常见的有机械摩擦盘式离合器、交流力短电机、磁粉离合器等。