China 'GB/T 2007.7-1987
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 2007.7-1987
General rules for the sampling and sample preparation of minerals in bulk--The method for determination of size by manual sieving 散装矿产品取样、制样通则 粒度测定方法 手工筛分法
Issued Date:1987-12-19
Implemented Date:1988-10-01
Issued by:
The Standardization Administration of the People's Republic of China