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GB/T 2820.9-2024_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) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 2820.9-2024
