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PT71873A
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Pre-fabricated beam element for self-supporting flat vaults of tunnel-type furnaces
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BE885456A
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Prefabricated beam element for self-supporting flat tunnel oven
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GR64519B
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Improved method for the furnaces construction in type of tunnel with flat chamber
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GR64517B
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Flat self-supported chamber for the furnaces like a tunnel,using especially for the bricks and tiles coasting
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GR64518B
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Improved system of drying for the bricks construction
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GR64520B
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Prefabricated element for the surfaces which used to industrial voasting
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CH621407A5
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Carriage for the transport of brick or ceramic products in a tunnel firing furnace
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