The polyurethane glue stock used for making draft roll was investigated by using self made chain extender and modifier.

采用自制扩链剂与改性剂，通过对聚合多元醇的品种与分子量的选择，研制出了适合纺织牵伸辊用的聚氨酯胶料。

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Adopt chain drive and roller-crushing plate feeding structure, which will not hurt the plate while roll press the plate backface;

采用链条传动，对辊式版材输送结构。不伤版面及版背辊压设计；

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The polyurethane glue stock used for making draft roll was investigated by using self made chain extender and modifier. The varieties and molecular weight of polyester polyol were selected.

采用自制扩链剂与改性剂，通过对聚合多元醇的品种与分子量的选择，研制出了适合纺织牵伸辊用的聚氨酯胶料。

youdao

With many analysts expecting Apple to roll out the iPhone 5 in September, improvements in the supply chain are certainly welcomed.

FORBES: Positive Input Price Trends Push Apple Stock To $430