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harvesting corn the combine harvester, or combine, or thresher, is a machine that combines the tasks of harvesting, threshing, and cleaning grain crops. the objective is to complete these three processes, which used to be distinct, in one pass of the machine over a particular part of the field. the waste straw
the underlying features of reliable loading as well as the ability to fire sustained multiple bursts of rounds, the only drawback being, it had to be manually operated and hand-cranked unlike its successor, the maxim gun , which was indisputably the world's first true machine gun. [ ] [ ] breakfast cereal...
https://en.wikipedia.org/wiki/Timeline_of_United_States_inventions_(before_1890)