| http://www.w3.org/ns/prov#value | - The drain pipe 53 is positioned essentially horizontally within the hillside 31 such that its longitudinal axis 67 at any point along the pipe 53 is substantially parallel to the face 31 of the hillside immediate or most proximate the point, i.e. the pipe is essentially tangent to the contour line 69 of the hillside 31.
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