GB/T 19502-2023 Chinese PDF (GB/T19502-2023) GB/T 19701.2-2024 English versions: GB/T 18376

English versions: GB/T 18376

English versions: GB/T 20790-2024

1-2025_Chinese: Test methods of rare earth phosphors for LED - Part 1: Determination of spectrum (Chinese: LED用稀土荧光粉试验方法 第1部分：光谱的测定)

2-2023_Chinese: Test conditions for numerically controlled turning machines and turning centres - Part 2: Geometric tests for machines with a vertical workholding spindle (Chinese: 数控车床和车削中心检验条件 第2部分：立式机床几何精度检验)

GB/T 18688-2023_Chinese: Agricultural irrigation equipment - Pressure losses in irrigation valves - Test method (Chinese: 农业灌溉设备 灌溉阀的压力损失 试验方法)

GB/T 19502-2023 Chinese PDF (GB/T19502-2023) GB/T 19701.2-2024 English versions: GB/T 18376GB T 19502 2023_Chinese: Surface chemical analysis General rules for glow discharge optical emission spectrometry(GD OES) (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19502 2023