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ES159095A1
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Improvements introduced in the iron sterometric armours for plate construction elements
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ES152271A1
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A stereometric armor for plate elements, especially of armed cement, exposed to the explosion action
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ES152141A1
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An anti-air shelter proof of pumps
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ES151576A1
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A new type of anti-aerial refuge
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DE704589C
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Air protection buildings, in particular air protection towers with a flat roof
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DE738784C
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Spacious iron reinforcement using lattice-shaped inserts
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