并长期从事塑料高分子的研究与开发，经广东省科技厅认定为民营科技企业。

It is recognized as a private technological enterprise by Guangdong Science and Technology Department.

youdao

并长期从事塑料高分子的研究与开发，经广东省科技厅认定为民营科技企业。

It is recognized as a private technological enterprise by Guangdong Science and Technology Department.

youdao