The assembly line was a system through which items were mass-produced in a flow. fill in the blank?

an assembly line, or progressive assembly, is a system, or manufacturing process,   in which parts, many times interchangeable, are added as the semi-finished assembly moves from workstation to workstation where the parts are added in sequence until the final assembly is produced, making a continuous flow of production.

you can fill the phrase with the word continuous.

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the articles of confederation placed most of the power on the feds

sorry i tried to but i didn’t get it