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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)
GB/T 15972
English versions: GB 45247-2025
4-四甲基-1
137-2025_Chinese: National food safety standard - Determination of antimony in foods (Chinese: 食品安全国家标准 食品中锑的测定)
GB 45669.2-2025 Chinese PDF GB 31604.30-2025 4-2025_Chinese: Instruments for stage measurementGB 45669. 2 2025_Chinese: Norm of water intake for industry in the Yellow River basin Part 2: Coal preparation (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 45669. 2 2025
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