It is found that the draw performance of IPP monofilaments is greatly promoted in the multi-stage drawing under the same spinning condition. The draw ratio approaches 25 x.

试验发现，在相同的纺丝条件下，多级拉伸大大提高了IPP单丝的拉伸性能，拉伸倍数可达25倍。

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The X-43A may be fast, but at this early stage, it needs a push to get going.

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