无卤低烟阻燃电缆的应力开裂影响因素主要与材料选用，工艺挤出有关，也与使用环境和储存条件不恰当有关。

The main factors for cable cracking are related to selection of cable compound and extrusion process. The cable cracking may be also caused by inappropriate application and storage of materials.

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把材料加热到这样的温度是不恰当的。

It is no good heating the material to such a temperature.

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