manufacturing plant is an industrial site, usually consisting of buildings and machinery, or more commonly a complex having several buildings, where workers manufacture goods
Hmm, do you work for an manufacturing plant?
We workers manufacture goods or operate machines processing one product into another.
Oh that's neat. What do you manufacture?
Garments ! Early factories that contained small amounts of machinery, such as one or two spinning mules, and fewer than a dozen workers
That's so cool.  I love clothes.
cotton mill is a factory housing powered spinning or weaving machinery for the production of yarn or cloth from cotton, an important product during the Industrial Revolution 
Who invented the cotton gin?
cotton gin is a machine that quickly and easily separates cotton fibers from their seeds, allowing for much greater productivity
Oh yeah, I thought that's what it did.