| http://www.w3.org/ns/prov#value | - These patents and other patents indicate how plastic pipes need differently designed and assembled, sealed, bolted joints, in contrast to sealed bolted joints such as illustrated in U.S. Pat. No. 4,092,036 of 1978, in which Messrs Sato and Edo, illustrated and described their pipe junction holder, which positioned at spaced radial locations about a pipe threaded-bolt-positioned-pipe-pressing membe
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