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2-2024_Chinese: Variable-frequency drive of 1 kV and below - Part 2: Test methods (Chinese: 1 kV及以下通用变频调速设备 第2部分：试验方法)
English versions: GB/T 17435-2025
2-2025_Chinese: Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low alloy steels
GB/T 20244-2025_Chinese: Fiber optic elements for image transmission (Chinese: 光学纤维传像元件)
GB/T 21551.6-2024 Chinese PDF (GB /T21551.6-2024) GB/T 20991-2024 2-2024_Chinese: Variable-frequency drive of 1GB T 21551. 6 2024_Chinese: Antimicrobial and cleaning function of household and similar electrical appliances Part 6: Particular requirements for air conditioner (Chinese: 6) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21551. 6 2024
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