When talking about hydraulic press machines, daylight means that there is a gap between the top and the bottom of the press when the top and bottom come together. This should not happen to ensure that proper pressure is achieved.
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Hydraulic Mean Radius = Cross sectional area of conduit divided by the inside (wetted) perimeter.
If you mean to the level of hydraulic fluid, it is usually a glass pipe with indication marks mounted on the hydraulic tank. You can usually find it behind one of the rear access panels.
A press is a device for applying a large force to some object or set of objects. Typical forces are in the range of one to fifty tons. In many cases the objects are metallic. A press may be used to form an object, to make a hole in it, or to force two objects together, amongst other purposes. If an electric motor or some other source of work other than human effort is used to drive the press then it is said to be a power press. If the press achieves the large forces required of it using, say, hydraulics then it is called an hydraulic press. If it uses some form of mechanical gearing to achieve the large forces that it imposes on the objects being processed, and the press is powered, then it is a mechanical power press. Probably the simplest form of mechanical press is shown in the top photograph in the article given by the link. Turning the handles at the top turns the screw which pushes the ram down onto the workpiece.
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I'm guessing you mean time machine, so I will interpret the question as "Do you have a time machine". No I don't have a time machine. Time machines do not exist.