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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 31235-2024
English versions: GB/T 45487-2025
English versions: GB/T 22474-2025
English versions: GB/T 45326-2025
GB 17945-2024 Chinese PDF GB/T 24498-2025 4-2024_Chinese: Ergonomics - Accessible designGB 17945 2024_Chinese: Fire emergency lighting and evacuate indicating system (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 17945 2024
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