Vertical shaft furnaces for cement firing with conical shaped burning zones
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Simplified method for measuring consistency of concrete
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More on firing anthracite coal
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Conduite du feu dans les fours rotatifs à ciment
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El cálculo térmico en los hornos de cemento, cal, magnesita y dolomita
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Recent research on portland cement in Russia
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Fly ash as a pozzolan
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A standard for concrete aggregates
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Practical aspects of instrumentation
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New lab for consolidated research
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Sands for plasters, mortars and external renderings
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New concept of rotary kiln plant
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Cement production in Japan
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Drying sizing system
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Firing kilns with low-grade coals
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Wet or dry masonry saw
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Von wesen der kohlenstaubflamme
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The extraction of cement-kiln dust by cyolones
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Calcination of carbonate sludge
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PLASTRON RESPIRATION IN AQUATIC INSECTS
SUMMARY The closed tracheal system of the aquatic larvae of insects, together with the typical tracheal gill, can only function if the tracheal tubes themselves have sufficient resistance to compression. The work of Ege showed conclusively that the ‘air stores’ of many aquatic insects can, if they are in communication…