监测井人孔
Complete line of Monitoring Well Manhole Covers – sizes 5” thru 12” diameter.Heavy duty cast iron covers and collars.Available in Steel or Galvanized sheet metal skirts.Quality construction with water tight covers utilizing Buna N rubber gaskets,stainless steel bolts,gasket washers 5" x 7 1/2" 8" x 7 1/2" 8" x 12"12" x 12"
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