petriplancter
Petriplancter (also known as automatic rock breakers) are large tools that are powered by elemental engines. They resemble large hammers attached to a gear assembly, which when activated repeatedly and rapidly strikes a spike or chisel. This is used to quickly tunnel through rock, dense earth, concrete, or other hard materials. A single petriplancter can match the work of a dozen dwarven miners, though they are large, difficult to maintain, and expensive.
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