Machinery refers to machines or machine systems collectively. Example is a plastic machinery - the term plastic is used to define those group of natural or synthetic material which can be formed, moulded and shaped into products using heating methods or by applying pressure.
Plastic machines have been in demand for a long time now, and it is increasing with the rise in demand of plastic products in industries like food, chemical, pharmaceuticals, aerospace, automobile etc. There is a vast and comprehensive range of plastic machines catering to different products and uses.
See also:
"Machinery" is in the NAICS Code "333"
(Machinery ManufacturingMachinery Manufacturing)