The paper describes a new type of tough and hard wear resistant composite gel coat and GRP mould preparation.

本文论述了一种新型坚韧耐磨复合胶壳的组成及其模具制作工艺。

youdao

The paper describes a new type of tough and hard wear resistant composite gel coat and GRP mould preparation.

本文论述了一种新型坚韧耐磨复合胶壳的组成及其模具制作工艺。

youdao