在此条件下，就能得到一个不随负荷而变化的恒定系数。
Under this conditions a constant coefficient, independent of load , can be obtained.
双油缸驱动，板式链承载负荷，安全系数大。
Driven by double cylinders, chain-type design, bear the load, more safety.
双油缸驱动，板式链承载负荷，安全系数大。
Driven by double cylinders, chain-type design, bear the load, more safety.
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