关于20g能否代用20R讨论

摘要

Through the analysis and comparison of the standards between20Rand 20g,the view point of whether 20g can substitute for 20R of the writer was presented in this article.At the same times,the proposal for establishing our material national was also stated.%本文通过对比分析20g与20R各自的标准要求，就20g是否能代用20R提出了自己的看法。同时，对我国的材料标准体系的建立提出了建议。