China 'GB/T 31226-2014
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 31226-2014
Standard test method for determination of surface roughness by scanning tunneling microscopy for gas distribution system components 扫描隧道显微术测定气体配送系统部件表面粗糙度的方法
Issued Date:2014-09-30
Implemented Date:2015-04-15
Issued by:
The Standardization Administration of the People's Republic of China