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Chemically and thermal resistant ceramic products. Method for determination of water permeability
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Zirconium containing refractory materials and products. Methods for determination of yttrium oxide
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Zirconium containing refractory materials and products. Methods for determination of titanium dioxide
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Lever balance of general use. Limits of weighing. Norms of accuracy
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Zinc concentrates. Method for the determination of calcium oxide, magnesium oxide and aluminium oxide
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