Compressors, namely, electric compressors, compressors powered by internal combustion engine, namely internal combustion engine for power generation; stationary and portable gas and air compressors, refrigerant compressors, and compressors for air conditioners; gas expanders, namely air motors, namely compressed air motors, pneumatic air motors and air engines, namely compressed air engines; steam engines; motors and engines for the generation of electricity; internal combustion engines; engi...