Abstract: The invention relates to a transcutaneous nerve and/or muscle stimulation appliance with electrodes destined to apply a sequence of electric pulses to the skin of a person, providing means that allow the generation of multiphase pulses during a stimulation period, these means allowing the generation of successive sequences of the above-mentioned multiphase pulses during successive stimulation periods with a frequency between 10 Hz and 100 Hz, more in particular a frequency of approximately 50 Hz, these means furthermore allowing a rest period between successive stimulation periods, during which rest period a sequence of electric pulses is generated with a frequency ranging from 0.5 Hz to 5 Hz and with an amplitude lower than that of the above-mentioned multiphase pulses.

Abstract: The invention relates to a device (8) which is used to inject a treatment gas into a molten metal contained in a tank (1) and which is designed to be fixed in one of the walls of said tank. The inventive device comprises at least one injection nozzle (18) which is equipped with an end hole (19). Said device is characterised in that it comprises a mobile means (14) which can be manoeuvred from outside of the injection device and which is used to unblock the aforementioned end hole of the nozzle.

Abstract: The invention relates to a device (8) which is used to inject a treatment gas into a molten metal contained in a tank (1) and which is designed to be fixed in one of the walls of said tank. The inventive device comprises at least one injection nozzle (18) which is equipped with an end hole (19). Said device is characterised in that it comprises a mobile means (14) which can be manoeuvred from outside of the injection device and which is used to unblock the aforementioned end hole of the nozzle.