The pit or the grease pit.
We just call it a pit.
Them people are called mechanics or automotive technicians.
mechanics
Mechanics.
Mechanics
Auto mechanics if you men repair them.
Mechanics and automobile technicians.
Call around to the local dealership service departments (most service all makes of cars). Also call around and get an estimate from some local mechanics.
The term I've usually heard for them is "creeper". I've also heard "mechanic's dolly."
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auto mechanics
Imagination, dedication, engineering and mechanics.
Automotive workshops mechanics