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Raremetallic concentrates. Methods for the determination of niobium pentoxide
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Petroleum and natural gas industries. Downhole equipment. Sand screens liquid centrifugal separators. General technical requirements
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Petroleum bitumen. Method for determination of ash content
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Marble. Method for the determination of magnesium oxide and magnesium carbonate
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Bitumen and bituminous binders. Test methods for emulsified bitumens used as protective coatings
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