GB 31604.31-2025 Chinese PDF GB/T 12540-2024 4-2025_Chinese: Instruments for stage measurement

4-2025_Chinese: Instruments for stage measurement - Part 4: Ultrasonic stage recorder (Chinese: 水位测量仪器 第4部分：超声波水位计)

2-2025_Chinese: Criteria for nuclear reactor instrumentation - Part 2: Pressurized water reactors (Chinese: 核反应堆仪表准则 第2部分：压水堆)

scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement (Chinese: 工业、科学和医疗设备 射频骚扰特性 限值和测量方法)

English versions: GB/T 10810

GB 31604.31-2025 Chinese PDF GB/T 12540-2024 4-2025_Chinese: Instruments for stage measurementGB 31604. 31 2025_Chinese: National food safety standard Food contact materials and products Determination of residual and migration of vinyl chloride, 1,1 dichloroethylene and 1,1 dichloroethane (Chinese: 1,1 1,1 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 31604. 31 2025