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The raw materials for producing fertilizers, such as oil, natural gas, coal, phosphate rock, etc., are abundant and can be extracted in large quantities.
The advantages and characteristics of spiral oil press
First, check and debug1, before the oil pump test, first add clean mechanical oil in the oil tank, press the handle up and down to see whether the piston of the oil press machine rises. If the piston does not rise or the handle is not diffi···...
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