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OLIVE OIL AND JOIST AND SCREW PRESS The joist and screw press does not have to confuse with the joist and hundredweight press of olive oil. In this press the pressure is made for a screw that firmly joined to a stone base that turned; the weight of the stone made it not to move so was the girder that moved down producing pressure on the cargo. The turn of the screw in the opposite direction allowed to raise the girder up to its rest point.
Joist and screw press, press made for a screw Source: Pieralisi España S.L
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