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Step irons in manhole structures –a volatile history

Proposal for solution from practice

By Wilfried Bonczyk

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Philippen Betonwerk GmbH &Co.KG Am Weidenhof 4 52525 Heinsberg,GERMANY T +49 2452 95070 F +49 2452 62718 www.philippen-betonwerk.de bonczyk@philippen-betonwerk.de

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CPi-worldwide trade journals are published in 10 language editions, bi-monthly to concrete production professionals worldwide for the concrete and precast industries. These trade journals feature practical editorial reporting on research, production, and applications, and specifically address decision makers, owners and specifiers in this sector.

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