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GB/T 31562-2024 Chinese PDF (GB/T31562-2024) GB/T 18876.2-2024 English versions: GB/T 45464-2025

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English versions: GB/T 45464-2025

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 31604

English versions: GB/T 30844

GB/T 31562-2024 Chinese PDF (GB/T31562-2024) GB/T 18876.2-2024 English versions: GB/T 45464-2025GB T 31562 2024_Chinese: Foundry machinery Determination method of cleanliness (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 31562 2024

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