repetitive.
Explanation:
In the 1800s, people haven't invented machines that could atomize a certain task in the factory. So, in order to fulfill massive amount of orders, companies hire factory labors to do a lot of repetitive tasks throughout the day.
For example, In a flour production company, there will be one person whose purpose in the company is to bag up the flour into the package. That worker will do that exact same thing throughout the year without any verities in his task.