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Fils Treppenabsätze bieten Vorteile:

• sie sind rutschfest

• Nadelabsätze bleiben nicht stecken

• Schnee haftet nicht
  (so bildet sich kein Eis)

• Erde fällt durch das Gitter

• Wasser fließt ab

• beste Belüftung

• und bei Brand wirksam als Flammenschneise

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