The name of someone who repairs machinery is a machanic.
A person who installs repairs replaces and dismantles the machinery and heavy equipment used in almost very industry is called a machinist.
Marine mechanic
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A person who repairs machines is commonly called a mechanic. Depending on their specific area of expertise, they may also be referred to as an automotive technician, industrial mechanic, or machinery repair technician. Their role involves diagnosing issues, performing maintenance, and fixing mechanical problems in various types of machines.
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Quodophile.
Luthier
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