英语语法分析

Wheather lampholder needs to be made of PMMA?

灯头是否需要使用亚克力的？

PMMA as a domestic industry for large companies.

作为国内有机玻璃行业的大型公司。

Basing on experiments, the creep constitutive relations of PMMA were researched.

在实验的基础上，对单轴pmma试件的蠕变型本构关系进行了研究。