China 'GB/T 11137-1989
' standard english version summary:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 11137-1989
Black petroleum products--Determination of kinematic viscosity (reverse-flow method) and calculation of dynamic viscosity 深色石油产品运动粘度测定法 (逆流法) 和动力粘度计算法
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The Standardization Administration of the People's Republic of China
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"GB/T 11137-1989" standard !
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