GB/T 45410.1-2025 Chinese PDF (GB /T45410.1-2025) GB/T 33798-2025 2-2025_Chinese: Semi-finished spectacle lens blanks

2-2025_Chinese: Semi-finished spectacle lens blanks - Part 2: Power-variation (Chinese: 半成品镜片毛坯 第2部分：渐变焦)

GB/T 4167-2024_Chinese: Weights (Chinese: 砝码)

GB/T 45359

GB/T 45168-2024_Chinese: Determination of chromium picolinate in health foods (Chinese: 保健食品中吡啶甲酸铬的测定)

English versions: GB/T 2812-2024

GB/T 45410.1-2025 Chinese PDF (GB /T45410.1-2025) GB/T 33798-2025 2-2025_Chinese: Semi-finished spectacle lens blanksGB T 45410. 1 2025_Chinese: Optics and photonics Test methods for telescopic systems Part 1: Basic characteristics (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45410. 1 2025