Principle of the Venturi tube: the increase in flow velocity due to the narrowing of the pipeline, and the subsequent widening of the same create a depression which, in correspondence with the derivation, causes the fertilizer to be sucked.
Principle of the Venturi tube: the increase in flow velocity due to the narrowing of the pipeline, and the subsequent widening of the same create a depression which, in correspondence with the derivation, causes the fertilizer to be sucked.