Pal spritz beim ersten aufziehen der Probe einen Teil zurück ins Vial und erst den Rest in den Abfall

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When the sample was first drawn, Pal injected a part back into the vial and only the rest into the waste.

When flushing the syringe with sample, part of the sample is injected back into the vial, then the PAL goes to the waste and empties the syringe completely.