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Publication of BE711175ApublicationCriticalpatent/BE711175A/fr
E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
E02D29/00—Independent underground or underwater structures; Retaining walls
E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
E—FIXED CONSTRUCTIONS
E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
E06C—LADDERS
E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted
E06C9/04—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted in the form of climbing irons or the like
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Engineering & Computer Science
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Mechanical Engineering
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Environmental & Geological Engineering
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Life Sciences & Earth Sciences
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General Life Sciences & Earth Sciences
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Mining & Mineral Resources
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Paleontology
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Civil Engineering
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General Engineering & Computer Science
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Structural Engineering
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Underground Structures, Protecting, Testing And Restoring Foundations
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