GB/Z 44938.1-2024 Chinese PDF (GB /Z44938.1-2024) GB/T 21666-2025 English versions: GB/T 35604-2025

English versions: GB/T 35604-2025

English versions: GB/T 45636-2025

English versions: GB/T 6930-2024

English versions: GB/T 45296-2025

1-2025_Chinese: Semi-finished spectacle lens blanks - Part 1: Single-vision and multifocal (Chinese: 半成品镜片毛坯 第1部分：单焦和多焦)

GB/Z 44938.1-2024 Chinese PDF (GB /Z44938.1-2024) GB/T 21666-2025 English versions: GB/T 35604-2025GBZ44938. 1 2024_Chinese: Electrical safety of machinery Part 1: Safety related sensors used for the protection of persons (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GBZ44938. 1 2024