直流电音效

https://elements.envato.com/energy-sound-pack-H6PLPSV

https://elements.envato.com/small-dc-motor-on-metal-spiral-insect-wings-01-XBG6DLU

https://elements.envato.com/small-dc-motor-for-gattling-gun-crank-pitch-down-0-2Q799ZG

https://elements.envato.com/small-d-c-motor-on-wood-resonator-01-YU4JV9A