Industrial Revolution Began With & Was Powered By Steam
Locomotives, farm equipment and so much more were invented to run harnessing power of steam.
Manufacturing and other facilities long had used line shaft to power various equipment, but power came from animals (in a cage or otherwise turning a wheel)or water wheel. Steam power allowed for all sorts of medium to large plants on farms, manufacturing and so on.
First steam (power) laundries of Victorian era were not called such because they used steam to heat water, irons, etc.. (which of course they did), but because steam provided power that ran line shafts which distributed power via system of belts and so forth to run washers, extractors, ironers, and other mechanical equipment.
Once electricity became widespread along with motors invented that were small and powerful enough to be fitted onto individual equipment, line shaft power quickly fell out of favor.
In many steam laundries and other plants "steam" now also provided energy for generator plants that produced electricity. The "waste" steam and or clean diverted from same boilers also provide energy for heating water (in washers) ironers, irons...
My guess is whatever plant is in linked OP stuck with line shaft for various reasons until they went out of business, closed or otherwise shut down.
en.wikipedia.org