GB/T 1844.1-2022塑料符号和缩略语第1部分:基础聚合物及其特征性能国家标准
英文:Plastics—Symbols and abbreviated terms—Part 1:Basic polymers and their special characteristics GB/T 1844.1-2022介绍: 国家...
英文:Plastics—Symbols and abbreviated terms—Part 1:Basic polymers and their special characteristics GB/T 1844.1-2022介绍: 国家...