Judge: Roger Thwaites
A group or singular device with moving/working parts.
May include the people and equipment that are used. Suggestions - gritty machinery, sweaty workers using machinery or unkempt industrial. Also could include cars, boats, bikes, motorbiles, tractors, transportation, mechanical items as in watches, clocks etc etc.
Updated 30th July
https://digital-photography-school.com/27-images-of-powerful-and-practical-machinery/ and some of these are valid from https://expertphotography.com/industrial-photography/ - beware some egs are industral architectural so not valid !!!