Question

Which one of the following is the best example of standardized parts?

gun parts
steam engine
coal mining industry

Answer 1

@haleyelizabeth2017

Answer 2

Which do you believe it to be?

Answer 3

A standard part is a part or material that conforms to an established industry or U.S. Government-published specification.
~wiki

Answer 4

Which of these objects have been mass produced by a factory, @peterg2001 ?
(Hint: It's not the coal mining industry ;) )

Answer 5

answer??????

Answer 6

You have to try and answer it first, @peterg2001
Then I'll tell you if you're right or not