China 'GB/T 34837-2017
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 34837-2017
Classification, terminology and numbering for parts and assemblies of the time measuring instruments—Quartz wrist watch movements 计时仪器零部件分类、名称和编号 石英手表机心
Issued Date:2017-11-01
Implemented Date:2018-05-01
Issued by:
The Standardization Administration of the People's Republic of China