production line

WordReference Random House Unabridged Dictionary of American English © 2025

produc′tion line′, 

1. Mechanical Engineering an arrangement of machines or sequence of operations involved with a single manufacturing operation or production process. Cf. assembly line, line ¹ (def. 29).

• 1930–35

Collins Concise English Dictionary © HarperCollins Publishers::

production line noun

1. a factory system in which parts or components of the end product are transported by a conveyor through a number of different sites at each of which a manual or machine operation is performed on them without interrupting the flow of production