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National Sharing Platform for Reference Materials
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Calibrated Glass Beads

Code 质量分数77％   Effective diameter (μm) 质量分数56％   Effective diameter (μm) 质量分数48％   Effective diameter (μm)
Value Relative Uncertainty(%) Value Relative Uncertainty(%) Value Relative Uncertainty(%)
GBW12002 166.2 5 146.3 5 139.3 5
GBW12003 66.3 5 58.8 5 55.9 5
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