However, in case of ductile materials they cause poor surface finish and low tool life.

可是在塑性材料加工时，造成表面光洁度和刀具寿命低。

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This is especially the case with soft materials, like rubber and other soft synthetics.

这是特别是与软质材料，如橡胶等软合成纤维。

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This is especially the case with soft materials, like rubber and other soft synthetics.

这是特别是与软质材料，如橡胶等软合成纤维。

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