Hydraulic system used in cnc machines

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Actually I Want to gather information about uses of hydraulic system in modern cnc machining...So please help me with more uses apart from the earlier.
 
At one time some large machines used hydraulic systems for the spindle drives and table positioning drives . Not so common now since most new machines have all electric drives .

In the period before actual cnc came along there were several types of semi automatic machine that used hydraulic copying systems .