GB/T 15558.4-2023 Chinese PDF (GB/T15558.4-2023) GB/T 24212-2025 English versions: GB/T 24438

English versions: GB/T 24438

English versions: GB 12268-2025

YY/T 0107-2024_Chinese: A mode ultasonic biometer for ophthalmology scanner (Chinese: 眼科A型超声测量仪)

3-2024_Chinese: Implants for surgery - Ultra-high-molecular-weight polyethylene - Part 3: Accelerated ageing methods (Chinese: 外科植入物 超高分子量聚乙烯 第3部分：加速老化方法)

GB/T 15558.4-2023 Chinese PDF (GB/T15558.4-2023) GB/T 24212-2025 English versions: GB/T 24438GB T 15558. 4 2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels Part 4: Valves (Chinese: PE 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15558. 4 2023