GB/T 28511.2-2023 Chinese PDF (GB/T28511.2-2023) GB/T 5612-2025 4-2024_Chinese: Ergonomics - Accessible design

4-2024_Chinese: Ergonomics - Accessible design - Part 4: A method for estimating minimum legible font size for people at any age (Chinese: 人类工效学 无障碍设计 第4部分：不同年龄人群最小可辨认字符尺寸的估计方法)

English versions: GB/T 45305

English versions: GB/T 29418-2023

GB 28007-2024_Chinese: Technical specifications for the safety of infants and children furniture (Chinese: 婴幼儿及儿童家具安全技术规范)

English versions: GB/T 17049-2024

GB/T 28511.2-2023 Chinese PDF (GB/T28511.2-2023) GB/T 5612-2025 4-2024_Chinese: Ergonomics - Accessible designGB T 28511. 2 2023_Chinese: Integrated optical path devices based on planar lightwave circuit Part 2: Dense wavelength division multiplexing(DWDM) filter based on arrayed waveguide grating(AWG) technology (Chinese: 2AWGDWDM) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28511. 2 2023