You can drill holes in the rock. Many useful things made of stone might require holes or something you can make from rock by drilling holes in it. While you may think this would be pretty challenging, the job be.
[pdf] It adopts a two-stage screw booster structure and is suitable for industrial applications with a pressure demand of 1.8MPa~4.0MPa. The medium and high pressure screw rotary air compressor features an imported integrated head for a compact structure, smooth operation, and low noise.
[pdf] An EU/EPA approved diesel air compressor is a type of air compressor that is powered by a portable air compressor diesel engine and has been certified to meet the stringent emission standards set by the European Union (EU) and the United States Environmental Protection Agency (EPA).
[pdf] 
