The tension is controlled by the pressure; in addition, the tension control unit has simple structure, low cost, steady tension and convenient regulation and maintenance.
气压控制张力，结构简单、成本低，张力稳定，而且调整维护方便。
The tension is controlled by the pressure; in addition, the tension control unit has simple structure, low cost, steady tension and convenient regulation and maintenance.
气压控制张力，结构简单、成本低，张力稳定，而且调整维护方便。
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