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GB/T 9253-2022_Chinese: Petroleum and natural gas industries - Threading, gauging and thread inspection of casing, tubing, and line pipe threads (Chinese: 石油天然气工业 套管、油管和管线管螺纹的加工、测量和检验) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 9253-2022
