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Spanner in the works

Posted by ESC on July 01, 2009 at 11:34

In Reply to: Spanner in the works posted by Giles Wynne on July 01, 2009 at 07:29:

: "Spanner in the works". Could this have been an expression used to slow down the production line on a car plant, which was going too fast?

Here some information, to get the discussion rolling:

https://www.phrases.org.uk/meanings/292200.html