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PL412038A1
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Water heater
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PL408054A1
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Prefabricated heat collector
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PL405113A1
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Composite floor prestressed in one or two directions, made from prefabricated, prestressed, thin bottom plates and concrete overlay
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PL404026A1
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Prefabricated ceiling compressed biaxially
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PL403962A1
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Monolithic ceiling compressed with bars
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PL386631A1
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Concrete and reinforced concrete structures prestressed with mild steel with the high yield point
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PL386490A1
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Steel structure prestressed with high yield-point weldable steel
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PL386396A1
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Prefabricated, reinforced concrete floor slab, prestressed with high yield stress weldable steel
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