知识贝壳
知识贝壳
所属栏目：合成革专业英语
The application viscosity of solutions of polyurethanes in organic solvents required fortechnical reasons imposes a restriction in terms of the molecular weight. By contrast,polyurethane/urea dispersions can be produced in the heterogeneous phase with alm ......（本文共 8311 字 ） [阅读本文] >>