How does an oil expeller work?​

It presses oil seeds through a caged barrel-like cavity

Explanation:

The machine uses friction and a lot of  pressure from the screw drive to move and compress the seed material.

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the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.