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2-2025_Chinese: Metallic materials - Vickers hardness test - Part 2: Verification and calibration of testing machines (Chinese: 金属材料 维氏硬度试验 第2部分：硬度计的检验与校准)
English versions: GB/T 18892-2024
GB/T 2684-2025_Chinese: Test methods for foundry sands and molding mixtures (Chinese: 铸造用砂及混合料试验方法)
English versions: GB/T 44879-2024
English versions: GB/T 45192-2025
GB/T 45446-2025 Chinese PDF (GB /T45446-2025) GB/T 45217-2025 2-2025_Chinese: Metallic materials - VickersGB T 45446 2025_Chinese: Interface specification for signal in space of BeiDou navigation satellite system precise point positioning service (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45446 2025
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