GB/T 20972.3-2025 Chinese PDF (GB /T20972.3-2025) GB/T 17215.241-2025 tests and safety aspects (Chinese:

tests and safety aspects (Chinese: 电气和电子设备机械结构 户外机壳 第3部分：环境要求、试验及安全要求)

GB/T 31126

3-2025_Chinese: Non-destructive testing - Ultrasonic testing block - Part 3: Calibration block for curved surface (Chinese: 无损检测 超声检测试块 第3部分：曲面检测标准试块)

1-2024_Chinese: Sterilization of health care products - Biological indicators - Part 1: General requirements (Chinese: 医疗保健产品灭菌 生物指示物 第1部分：通则)

GB/T 20972.3-2025 Chinese PDF (GB /T20972.3-2025) GB/T 17215.241-2025 tests and safety aspects (Chinese:GB T 20972. 3 2025_Chinese: Petroleum and natural gas industries Materials for use in H2S containing environments in oil and gas production Part 3: Cracking resistant CRAs(corrosion resistant alloys) and other alloys (Chinese: 3) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20972. 3 2025