a locksmith
A locksmith repairs locks.
locksmith
A person who installs and repairs water systems.
A person who repairs and installs electrical equipment.
A locksmith
A plumber is a person who installs and repairs pipes, fixtures, and appliances.
A person who installs repairs replaces and dismantles the machinery and heavy equipment used in almost very industry is called a machinist.
A locksmith repairs locks
I think the most proper name would be glazier, which is someone who installs and repairs glass.
a locksmith
Someone who makes and repairs locks is a locksmith; someone who makes hinges would be a blacksmith or forger. Sometimes one person will be both; today most hinges and locks are made in factories.
He who installs, repairs and maintains broadband, mobile phones and landline telephone networks.
One that installs or repairs equipment (such as steam pipes) for heating, ventilating, or refrigerating systems