What does the data on the counters' clocks mean?

On the dial of all water meters, both smart and traditional, the most important data for each model of the meter are printed.

Let’s take an example from the Predator meter by Hidroconta, a Woltmann-type meter approved for use in potable water and irrigation systems. The following information can be found:

Manufacturer’s name: the company that produced the meter.
National metrology mark for use in public hydraulic water: certification for use in public hydraulic water domains.
Type certificate number issued by the control body for use in public hydraulic water: identification number for the type approval issued by the relevant control authority.
European ce mark and additional metrology mark for use in potable water: compliance with european standards and additional metrology certification for potable water.
Ce type certificate number issued by the notified body for use in potable water: identification number for the type approval issued by the notified body for potable water use.
Permanent flow rate admitted by the meter: the maximum continuous flow rate the meter can handle.
Pressure loss class: classification indicating the pressure drop across the meter.
Sensitivity class or installation conditions: sensitivity rating and specific installation requirements.
Maximum admissible pressure for the equipment: the highest pressure the meter can safely withstand.
Working ratio of the meter: the operational range or ratio of the meter.
Serial number of the meter issued by the manufacturer: unique identification number assigned by the manufacturer.