bucket brigade

noun3

1. •
   The long line of people, in a primitive firefighting technique, who pass buckets of water hand-to-hand from the nearest water source to the site of a fire, in an attempt to douse it.
2. •
   A discrete-time analogue delay line that moves a signal along a line of capacitors, one step at each clock cycle.
3. •
   (figurative) Any process in which something is passed along a chain.