signage blue and red indicate deepness position sewerage water pipes public area

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signage in blue and red to indicate deepness and position of sewerage and water pipes in public area Royalty Free Stock Photo
signage in blue and red to indicate deepness and position of sewerage and water pipes in public area Royalty Free Stock Photo
   
   
   
   
   
signage in blue and red to indicate deepness and position of sewerage and water pipes in public area
   
   
   
   
   
   
   
Zempin, Germany - April 18, 2014: signage in blue and red to indicate deepness and position of sewerage and water pipes in public area

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