high draft spinning是什么意思

用法例句

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。