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Chinese National Standards
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R-Ceramic Industry
CNS 620    2020 Edition
Method for determination of true density of refractory materials
耐火材料真密度測定法
R-Ceramic Industry
CNS 11738    2020 Edition
Method of Test for Specific Gravity and true Porosity of Insulating Fire Bricks
絕熱耐火磚比重及真孔隙度試驗法

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