China 'GB/T 22512.2-2008
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 22512.2-2008
Petroleum and natural gas industries - Rotary drilling equiment - Part 2: Threading and gauging of rotary shouldered thread connections 石油天然气工业 旋转钻井设备 第2部分:旋转台肩式螺纹连接的加工与测量
Issued Date:2008-11-04
Implemented Date:2009-05-01
Issued by:
The Standardization Administration of the People's Republic of China
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