| 摘要 |
With the object of, when a table unit is moved downward as viewed in a vertical direction by use of an actuator, smoothly moving the table unit and enhancing operability, when the actuator moves the table unit from a first position in the vertical direction to a downward second position, a pressure controller adjusts the amount of fluid held in the actuator on the basis of the first position of the table unit, detected by a position detector to thereby control pressure based on the fluid.
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