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English versions: GB 32051-2024
English versions: GB/T 36621-2025
English versions: GB/T 17988-2024
in calibration of measuring equipment and in product verification (Chinese: 产品几何技术规范(GPS) 工件与测量设备的测量检验 第2部分：GPS测量、测量设备校准和产品验证中的测量不确定度评估指南)
GB/T 28799.4-2024 Chinese PDF (GB/T28799.4-2024) GB/T 21196.2-2025 English versions: GB 32051-2024GB T 28799. 4 2024_Chinese: Polyethylene of raised temperature resistance(PE RT) piping systems for hot and cold water installations Part 4: Valves (Chinese: PE RT 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28799. 4 2024
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