| 摘要 |
The invention relates to an expulsion device (10) for expelling objects (58) or liquid materials from a reservoir (15) by means of a drive piston (20) which is subjected to the action of the pressure medium, comprising a pressure medium container (14) which is exchangeable and connected to a device body (11), enabling the pressure medium to act on the drive piston (20) which is thus displaced in a forwards and backwards direction.
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