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primary standard of laser small angle
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primary standard of laser small angle
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工学
角度计量技术
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primary standard of laser small angle
激光小角度计量基准
用于±1°范围内小角度量值的校准和溯源,复现和保存小角度量值,具有最高准确度,统一全国小角度量值的最高依据的国家计量基准。
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