| http://www.w3.org/ns/prov#value | - ter the ends of two adjacent piping sections have been secured by the joining collar the piping sections are guided into the borehole with the directional collar disposed adjacent the collar by the resistance of the directional collar against the borehole wall and as the piping sections are pulled through the borehole the beveled end deflects rocks, stones, and other debris away from the joining c
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