GB/T 22271.1-2021塑料聚甲醛(POM)模塑和挤出材料第1部分:命名系统和分类基础标准
英文:Plastics—Polyoxymethylene(POM) moulding and extrusion materials—Part 1:Designation system and basis for specification...
英文:Plastics—Polyoxymethylene(POM) moulding and extrusion materials—Part 1:Designation system and basis for specification...