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GB/T 20657-2022 Chinese PDF (GB/T20657-2022) GB/T 10067.101-2023 English versions: GB/T 45583-2025
GB/T 20657-2022 Chinese PDF (GB/T20657-2022) GB/T 10067.101-2023 English versions: GB/T 45583-2025
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English versions: GB/T 45583-2025
English versions: GB/T 26940-2023
English versions: GB/T 28906-2025
English versions: GB/T 16472-2024
GB/T 44936
GB/T 20657-2022 Chinese PDF (GB/T20657-2022) GB/T 10067.101-2023 English versions: GB/T 45583-2025GB T 20657 2022_Chinese: Petroleum and natural gas industries Formulae and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20657 2022
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