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 2016-06-17: More changes
 * Added homedecor chainlink and barbed gates, fixed chainlink corner
 * Fixed streets steel support, added infrastructure truss
-* Added infrastructure 'riffled' sheet (diamond plate)
+* Added infrastructure 'riffled' sheet (diamond plate), corrugated sheet 
+and galvanized steel block.
 
 2016-06-(16-17): A whole bunch of changes:
 * Added support for 0.4.14-style fences
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