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4,510 ft (1,370 m) (top) [2] The Devil's Kitchen Sinkhole is a sinkhole near Sedona, Arizona on the Soldier Pass Trail in the Coconino National Forest. Formed in the late 1880s, It is one of the at least seven sinkholes surrounding the city. [3] The sinkhole is about 660 ft (200 m) deep, but enters a cave that adds 180 ft (55 m), for a total of ...
Engineering drawing abbreviations and symbols
Caisson (engineering)
Autoclaved aerated concrete
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Sanitary manhole
Shop drawing - Wikipedia ... Shop drawing
DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct creation of DXF files difficult. Autodesk now publishes the incomplete [3] DXF specifications online.