parallel ruler

(General Engineering) engineering a drawing instrument in which two parallel edges are connected so that they remain parallel, although the distance between them can be varied

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

References in periodicals archive

Eretan explained that Ojagbohunmi, who had been parading himself as the parallel ruler of the community, was formally invited by the security agents and was subsequently arrested and transferred to Akure, the state capital before he was arraigned in court.

No Longer At Ease: Traditional Leadership Tussle Gets Messier In Ondo Coastal Community

The slide comes off from the rear because the barrel has links pinned to the receiver at both front and rear, giving the gun its "parallel ruler" moniker.

The Colt "parallel ruler" pistol: before the 1911, John browning took a different path

But while he's no longer president, he has effectively emerged as a parallel ruler: His loyalists and relatives still pervade state bodies and military, and officials who back the new government say he uses those levers to persistently undermine them.

Ousted leader undermining Al-Qaeda fight, say Yemenis

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