duplex process

noun

1. any of several methods for making steel in which the process is begun in one furnace and finished in another.

Word History and Origins

Origin of duplex process¹

First recorded in 1900–05

Example Sentences

It would be hard to say which of the two reaped the more pleasure from the relation, or which, in the duplex process of teaching and learning, gained the most.

From Project Gutenberg