tough pitch

tough pitch

noun Metallurgy.
the state of refined copper when it is soft, malleable, and flexible: tough pitch copper.

Origin:
1880–85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Tough pitch is always a great word to know.
So is friction. Does it mean:
says when a net force acting on an object will cause acceleration of that object
surface resistance to relative motion, as of sliding or rolling.
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