In order to carry out the constant line speed and the constant tension for the rolling of plastic films during reversal, loop control of the rotating speeds and the tension is adopted.
为实现翻转过程中薄膜的恒线速度、恒张力控制，采用转速和张力的闭环控制，将线速度作为主控制变量，进行综合控制。
The in-line spring-actuated lift check also is referred to as the "silent check" because the spring closes the valve before gravity and fluid reversal can slam the valve closed.
由于这种止回阀能够在重力和介质倒流撞击启闭件之前关闭阀门，因此这种直通弹簧驱动升降式止回阀也称为“静音”止回阀。
The DSV? is an in-line spring-assisted check valve designed to prevent flow reversal in industries with strict cleanliness codes.
同轴、管内弹簧止回阀，工业上要求严格的清理时可用来防止水倒流。
The DSV? is an in-line spring-assisted check valve designed to prevent flow reversal in industries with strict cleanliness codes.
同轴、管内弹簧止回阀，工业上要求严格的清理时可用来防止水倒流。
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