I've recently had some problems with an instruction booklet, and one of the puzzling things was the expression "bull wheel". I would like to know if you people, especially those of you who use English on a daily basis, would recognize this expression?
Thanks in advance!
ETA: The instruction booklet belongs to a toy/alarm clock, and the "bull wheel" in question seems to be the two wheels that gets the thing moving. Maybe the writer of the booklet wanted to form an association to the wheels of industrial or agricultural machines, the design looks a little bit like that. I haven't read all the languages, sadly I'm not that gifted, but the "bull wheel" returns in at least the German and the Swedish translation, where it makes even less sense.
Thanks for all the answers and comments!