Answer :

Final answer:

An electric rotary hammer is primarily used to drill holes in concrete. It combines hammering action and rotation to penetrate hard materials like concrete.


Explanation:

An electric rotary hammer is primarily used to drill holes in concrete. It is a powerful tool that combines a hammering action with rotation to penetrate hard materials like concrete. The hammering action generates an impact force that helps break up the concrete, while the rotation enables the drill bit to drill through it.


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