GB/T 4214.21-2025 Chinese PDF (GB /T4214.21-2025) GB/T 22211-2025 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)

GB/T 25820-2025_Chinese: Steel strapping for packaging (Chinese: 包装用钢带)

English versions: GB/T 33920-2025

GB/T 13815

GB 23394-2024_Chinese: Respiratory protection - Positive pressure self-contained closed-circuit compressed oxygen breathing apparatus (Chinese: 呼吸防护 正压式自给闭路压缩氧气呼吸器)

GB/T 4214.21-2025 Chinese PDF (GB /T4214.21-2025) GB/T 22211-2025 4-2024_Chinese: Ergonomics - Accessible designGB T 4214. 21 2025_Chinese: Test method for noise of household and similar electrical appliances Part 21: Particular requirements for oral hygiene appliances (Chinese: 21) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4214. 21 2025