| 摘要 |
A press has upper and lower dies, an actuating element spaced vertically from one of the dies, and a platen carrying the one die and between the element and the one die. A membrane defines a closed chamber having one side operatively bearing vertically on the platen and an opposite side bearing vertically on the element. A fluid supply pressurizes the chamber and maintains in the chamber a predetermined pressure. An actuator connected to the element vertically displaces the element, platen, and one die.
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