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GB/T 20657-2022_Chinese: Petroleum and natural gas industries - Formulae and calculations for the properties of casing
8-2025_Chinese: Electromagnetic compatibility - General - Part 8: Phase angles of harmonic current emissions and voltages in the public supply networks - Future expectations (Chinese: 电磁兼容 综述 第8部分：公用电网谐波电流发射与电压相角 未来预期)
English versions: GB/T 44985
English versions: GB/T 15683-2025
GB/T 22620-2023 Chinese PDF (GB/T22620-2023) GB/T 45029-2024 GB/T 20657-2022_Chinese: Petroleum and naturalGB T 22620 2023_Chinese: Bifenthrin emulsifiable concentrate (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 22620 2023
