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The wehler floor brick
An improved hollow tile for floor and ceiling filling in connection with iron girders. A peculiar lock joint is used. (2000 w.)
The wehler floor brick
An improved hollow tile for floor and ceiling filling in connection with iron girders. A peculiar lock joint is used. (2000 w.)
The wehler floor brick
Der Wellenfalgziegel Patent Wehler
1897
Article (Journal)
German
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