A man dressed in a brown shirt and tan shorts is down on one knee looking at some type of machinery.
The man is examining a machine.
A man, most commonly, when examining something, first engages in the act of looking at that something; examining is a way of rephrasing looking at, and machinery means machine(s) of some type, therefore, man looking at machinery is the same as man examining machine.
Looking at and examining are synonyms. A machine is a type of machinery.
Examining is the same as looking at and a machine is a type of machinery.