GB/T 23554-2023 Chinese PDF (GB/T23554-2023) GB/T 45364-2025 1-2024_Chinese: Cast iron pipe flanges

1-2024_Chinese: Cast iron pipe flanges - Part 1: PN designated (Chinese: 铸铁管法兰 第1部分：PN系列)

1-2024_Chinese: Non-destructive testing - Ultrasonic guided-wave testing - Part 1: General principle (Chinese: 无损检测 超声导波检测 第1部分：总则)

GB/T 30843

English versions: GB/T 20130-2025

2-2024_Chinese: Mechanical structures for electrical and electronic equipment - Outdoor enclosures - Part 2: Coordination dimensions (Chinese: 电气和电子设备机械结构 户外机壳 第2部分：协调尺寸)

GB/T 23554-2023 Chinese PDF (GB/T23554-2023) GB/T 45364-2025 1-2024_Chinese: Cast iron pipe flangesGB T 23554 2023_Chinese: Ethephon soluble 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 23554 2023