GB/T 22504.4-2024 Chinese PDF (GB/T22504.4-2024) GB/T 25936.4-2024 GB/T 2684-2025_Chinese: Test methods for

GB/T 2684-2025_Chinese: Test methods for foundry sands and molding mixtures (Chinese: 铸造用砂及混合料试验方法)

English versions: GB/T 45139-2024

English versions: GB/T 2684-2025

GB/T 45002-2024_Chinese: Method for determining water retention of cement mortar (Chinese: 水泥胶砂保水率测定方法)

3-2024_Chinese: Optics and photonics - Microlens arrays - Part 3: Test methods for optical properties (Chinese: 光学和光子学 微透镜阵列 第3部分：光学特性测试方法)

GB/T 22504.4-2024 Chinese PDF (GB/T22504.4-2024) GB/T 25936.4-2024 GB/T 2684-2025_Chinese: Test methods forGB T 22504. 4 2024_Chinese: Inspection of grain and oils Assistant atlas of grain sensory inspection Part 4: Oilseeds (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 22504. 4 2024