GB/T 30966.4-2023 Chinese PDF (GB/T30966.4-2023) GB/T 45540-2025 20-2025_Chinese: Methods for chemical analysis

20-2025_Chinese: Methods for chemical analysis of tungsten concentrates - Part 20: Determination of mercury content - Solid sampling and direct mercury analysis method (Chinese: 钨精矿化学分析方法 第20部分：汞含量的测定 固体进样直接测定法)

English versions: GB/T 17988-2024

9-2024_Chinese: Reciprocating internal combustion engine driven alternating current generating sets - Part 9: Measurement and evaluation of mechanical vibrations (Chinese: 往复式内燃机驱动的交流发电机组 第9部分：机械振动的测量和评价)

English versions: GB/T 16477

GB/T 30966.4-2023 Chinese PDF (GB/T30966.4-2023) GB/T 45540-2025 20-2025_Chinese: Methods for chemical analysisGB T 30966. 4 2023_Chinese: Wind energy generation systems Communication for monitoring and control of wind power plants Part 4: Mapping to communication profile (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 30966. 4 2023