| 摘要 |
For upside-down operation a metering pump (8) is provided with a displaceable cylinder (16) and a valve (19) located directly at a droplet delivery orifice (15). Vent (70) for a reservoir (6) comprise a germ filter (71). For venting the medium spaces (12, 13) actuator (20) are provided which on the return stroke of the outlet valve (19) briefly crack open. For operation in the upright normal position a suction tube may be applied to the inlet (45) of the dispenser (1).
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