In order to maintain their body temperatures, Chickadees must take in a large number of food calories which will be metabolized for body heat. Calder (1974) notes that Black-capped Chickadees ... must eat continuously during short daylight hours to stoke their metabolic fires.
Industrial sewing machines are the best option for sewing upholstery-grade fabrics such as vinyl and leather because these machines are designed to handle thicker fabrics. Industrial machines use heavier upholstery thread and often sturdier needles which penetrate the material cleanly.
CNC Lathes are used to cut metal that is spinning rapidly, like traditional lathes, but with more precision and the convenience of hands-off CNC technology. Finally, CNC grinders use a coated wheel (again, like traditional grinders) to grind things into shape.