GB/T 13871.4-2023 Chinese PDF (GB/T13871.4-2023) GB/T 19973.2-2025 English versions: GB/T 20604-2025

English versions: GB/T 20604-2025

English versions: GB/T 16263

1-2025_Chinese: Information technology - Extensible biometric data interchange formats - Part 1: Framework (Chinese: 信息技术 可扩展的生物特征识别数据交换格式 第1部分：框架)

GB/T 45340-2025_Chinese: Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method (Chinese: 金属及其他无机覆盖层 镀层厚度的测量 斐索多光束干涉法)

2-2025_Chinese: Leather and fur - Determination of chlorinated hydrocarbons - Part 2: Middle-chain chlorinated paraffins(MCCPs) (Chinese: 皮革和毛皮 氯代烃的测定 第2部分：中链氯化石蜡)

GB/T 13871.4-2023 Chinese PDF (GB/T13871.4-2023) GB/T 19973.2-2025 English versions: GB/T 20604-2025GB T 13871. 4 2023_Chinese: Rotary shaft lip type seals incorporating elastomeric sealing elements Part 4: Performance test procedures (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 13871. 4 2023