The good velocity controllability of servo-dynamo can be used to realize variable blank holding force control through adjusting the force on sheet metal blank with a holding force adjusting equipment.

利用伺服电机良好的速度可控性，可以通过压边力调节装置调整作用在板坯上的压边力的大小，更容易实施变压边力控制。

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It is unable to control the blank width ratio for a broad plate when it is compressed to take shape finally.

对宽板的最后成形锻造，料宽比是无法控制的。

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RESULTS: Observing a cut section of liver tissues, pathologic fibrosis changes are typical in model group, content of HYP in liver is obviously level to blank control group.

结果：模型组肝切片观察显示典型的肝纤维化病理变化，肝中hyp含量明显高于空白对照组。

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