Hellin’s law

What is Hellin’s law?

Hellin’s law definition and meaning on Dictionary terms:
noun
a person or thing that helps or gives assistance, support, etc.
an extra locomotive attached to a train at the front, middle, or rear, especially to provide extra power for climbing a steep grade.Compare doubleheader, pusher(def 5).

 

reference: www.dictionary.com/browse/hellin-s-law

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