What is pipet rule 34?

As an AI language model, I do not have information about "pipet rule 34" as it is not a scientifically recognized term. However, I can provide information on pipette - a laboratory tool used to measure and transfer small volumes of liquid. Pipettes come in various sizes and types, including micropipettes, serological pipettes, and volumetric pipettes. Pipette rule or "pipetting rules" are a set of guidelines used to ensure accuracy and precision while using pipettes. These rules include factors that can affect pipette accuracy, such as pipette tip selection, angle of pipette placement, and proper technique for aspirating and dispensing liquid.