| 摘要 |
A housing for a drive cylinder which comprises an inner tube and an outer tube. The inner tube is a metal tube and is encircled by the outer tube consisting of synthetic resin material coaxially. In this manner it is possible to ensure a highly accurate cross section for the inner surface swept by the piston during operation. Simultaneously there is a large amount of freedom as regards any desired particular configuration of the external surface of the cylinder barrel.
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