Power trowel

A power trowel (also known as a "power float" and "troweling machine") is a piece of light construction equipment used by construction companies and contractors to apply a smooth finish to concrete slabs.
Types.
Power trowels differ in the way they are controlled:
A power trowel performs the tasks of several hand tools, hand trowel, hand float, darbie and concrete float.
References.
Concrete Power Trowel. Concrete Ride On Power Trowel.