had a fire truck that came from the manufacture without "pull strings" in the radio conduits the conduit had at least 5 bends in it
i tied a nut to a pull cord and stuffed it and a dozen feet of cord in the conduit and blasted it out with 150 psi compressed air

i have used a high power slingshot to fire a rubber ball with a string attached

if you carefuly wind a cable into a loop you can "roll" the loop accross a drop ceiling (when i installed cctv i could get between 25' and 50' throws covering a large drugstore in a couple throws)