Correct option is A
A gang drilling machine has multiple drill heads that are arranged in a row on a single worktable. Each drill head has its own driving motor, so the speed and feed of each spindle can be controlled independently.
Gang drilling machines are used in mass production, especially in assembly lines where identical components need consistent hole patterns. Gang drilling machines can perform a series of operations on a workpiece, such as drilling, reaming, counter boring, and tapping.
