Specks or unmelts are more likely in off-spec or post-industrial recycled material.

黑点或不熔物更可能出现在副牌料或后工业回收材料中。

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Simulation results show that through implementation of optimal control, the transition time and off-spec product can be reduced over 60% in the polypropylene grade transition.

仿真结果表明，通过实施优化控制，能够使产品牌号切换过程的过渡时间和过渡料数量降低60％以上。

youdao

Simulation results show that through implementation of optimal control, the transition time and off-spec product can be reduced over 60% in the polypropylene grade transition.

仿真结果表明，通过实施优化控制，能够使产品牌号切换过程的过渡时间和过渡料数量降低60％以上。

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