I recorded sound of my washing machine by korg r-09 put on top of that. I succeeded in recording the sound of waving water with deep reverb and shaking the motor. This sound is trimmed a part of bass.
This is a machine i recorded from a lab that designs water meters, and other water movement equipment. It actually has nothing to do with breathing, but we joked that it had a vader like quality to it. Enjoy!.
A sewing machine starting up and sewing twice, with the normal rattle and whirr of its motor. (it could also be used for a biplane's propeller, just a thought. ).
A passing grocery cart corralling machine used in parking lots to assist with returning buggies to the store. The presumably electric motor and slight jiggle of the metal carts can be heard. Sound is loopable.