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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answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

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stewards ice box was the purchase of alaska from russia and it was called that because people thought it was not a good idea to purchase alaska