|a sequence of machines, tools, operations, workers, etc, in a factory, arranged so that at each stage a further process is carried out|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
A line of factory workers and equipment along which a product being assembled passes consecutively from operation to operation until completed.
Note: Assembly lines are found in many industries but are particularly associated with automobile manufacturing.