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English definition of “assembly line”

assembly line

noun [C usually singular]    
a line of machines and workers in a factory that a product moves along while it is being built or produced. Each machine or worker performs a particular job, which must be finished before the product moves to the next position in the line: assembly-line workersFactories
(Definition of assembly line noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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