A building where things are made in large quantities, usually by machines?

or:A building where things are made in large quantities, usually by machines?or:That is called a factory, but it does not have to involve machines, a

or:A building where things are made in large quantities, usually by machines?

or:That is called a factory, but it does not have to involve machines, and it does not have to be a building. For example the bacteria that make B vitamins in your gut are referred to as a factory.

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