GB/T 38023-2019机械手表机心零部件的精饰要求国家标准
英文:Finishing requirements for parts and assemblies of the mechanical watch movements GB/T 38023-2019介绍: 国家标准《机械手表机心零部件的精...
英文:Finishing requirements for parts and assemblies of the mechanical watch movements GB/T 38023-2019介绍: 国家标准《机械手表机心零部件的精...