| 摘要 |
A pressure system, by means of which it is possible to produce various pressure levels to be used advantageously in an injection device of living cells, which injection device comprises a pressure source for pressurizing a medium and a capillary (7). The pressure system comprises an input (IN) of pressurized medium, an output (OUT) for connecting to a capillary (7), and means (2, 8, 9) for directing positive pressure to the output (OUT). In addition, the system comprises means (3, 13) for forming negative pressure by using positive pressure and means (2, 4) for directing the negative pressure to the output (OUT). |
