EP4239269A1 - Dispositif de pré-séchage et d'agitation mécanique pour la production de pâtes alimentaires - Google Patents

Dispositif de pré-séchage et d'agitation mécanique pour la production de pâtes alimentaires Download PDF

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Publication number
EP4239269A1
EP4239269A1 EP23159671.9A EP23159671A EP4239269A1 EP 4239269 A1 EP4239269 A1 EP 4239269A1 EP 23159671 A EP23159671 A EP 23159671A EP 4239269 A1 EP4239269 A1 EP 4239269A1
Authority
EP
European Patent Office
Prior art keywords
containment structure
air
decantation
accumulation
agitation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23159671.9A
Other languages
German (de)
English (en)
Inventor
Enrico Fava
Renato DALL'AGATA
Fabio TRINCA
Luca ALBERGHINI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAVA SpA
Original Assignee
FAVA SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAVA SpA filed Critical FAVA SpA
Publication of EP4239269A1 publication Critical patent/EP4239269A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/06—Long pasta, e.g. spaghetti
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/08—Short pasta, e.g. macaroni, vermicelli

Definitions

  • the present invention refers to a pre-drying and mechanical agitation device for the production of pasta.
  • Such shakers of a known type comprise a containment structure provided with an inlet opening and an outlet opening for the pasta, within which there are vibrating shelves that mechanically agitate the pasta, while transporting it from the inlet opening to the outlet opening.
  • heat exchangers typically finned batteries fed by a thermodynamic circuit in which a heat transfer fluid flows, which heat a flow of air that is generated by fans, and which cyclically passes through these heat exchangers, heating up, and through the pasta that transits on conveyor belts, removing a certain percentage of moisture therefrom.
  • shakers are also equipped with an ejection system that extracts air from the inside of the containment structure, evacuating it into the environment, while at the same time creating a vacuum inside the containment structure that causes new air to enter from the environment through the inlet opening.
  • the presence of a high amount of dust in the air that is ejected by the ejection system means that the latter requires a complex filtering system, which, in addition to increasing the overall costs of the shaker, requires frequent cleaning and maintenance, resulting in increased downtime and operating costs.
  • the main scope of the present invention is to solve the problems listed above, and thus to realise a pre-drying and mechanical agitation device for the production of pasta (a so-called shaker), wherein the need for maintenance and the risk of machine downtime caused by dust separating from the pasta are reduced compared to the known technique described above.
  • another aim of the invention is to realise a pre-drying and mechanical agitation device for the production of pasta that allows reducing the use of and/or the frequency of maintenance or replacement of filters to trap the dust present in the air released into the environment by the device.
  • a further aim of the invention is to facilitate the removal of the dust that separates from the pasta inside the pre-drying and mechanical agitation device.
  • a pre-drying and mechanical agitation device for the production of pasta comprising:
  • Such a device 1 may advantageously be part of a pasta production plant which may comprise other devices, not illustrated, operatively connected upstream (e.g. a pasta die) and downstream (e.g. a dryer and cooler) of the device 1.
  • upstream e.g. a pasta die
  • downstream e.g. a dryer and cooler
  • the device 1 advantageously comprises electronic control means, not illustrated, configured to control one or more functions of the device 1 itself; advantageously, such electronic control means may comprise, for example, a microprocessor, or a microcontroller, or a programmable logic controller (PLC), etc.
  • electronic control means may comprise, for example, a microprocessor, or a microcontroller, or a programmable logic controller (PLC), etc.
  • the device 1 comprises a containment structure 2, such as a metal casing, the inside of which is in fluid communication with the external environment 40 through an inlet opening 3 and an outlet opening 4 for pasta 5.
  • a containment structure 2 such as a metal casing, the inside of which is in fluid communication with the external environment 40 through an inlet opening 3 and an outlet opening 4 for pasta 5.
  • agitation and transport means 6 suitable for mechanically agitating the pasta 5, while transporting it from the inlet opening 3 to the outlet opening 4.
  • the agitation and transport means 6 comprise one or more vibrating shelves (in the advantageous example illustrated in the appended figures there are three shelves, indicated respectively by the numbers 7a, 7b and 7c,) positioned within the containment structure 2, suitable for housing pasta 5 which enters the containment structure 2 through the inlet opening 3; such one or more vibrating shelves 7a, 7b, 7c advantageously have a perforated structure (or in other words, they have through-holes obtained on their surface, so that they can be crossed by a flow of air) and have a substantially rectangular plan.
  • a plurality of vibrating shelves (three, 7a, 7b and 7c in the advantageous example of the appended figures), arranged one above the other, advantageously at a predetermined mutual distance (not necessarily the same for all the pairs of overlapping shelves), and are advantageously arranged, in plan view, offset from one other, in such a manner that the pasta 5 which, due to vibration, escapes from one end of an upper shelf (e.g. the shelf 7c in the appended figures), falls onto the shelf arranged immediately below it (e.g.
  • the shelf 7b in the advantageous example in the appended figures); in this way the pasta entering from the inlet opening 3, after having travelled, being agitated, through a first vibrating shelf (for example the shelf 7c), passes from one shelf to the lower shelf (for example from 7c to 7b), until reaching a last vibrating shelf (7a in the advantageous example of the appended figures) which communicates with the outlet opening 4, finally exiting from the latter by the action of the vibration.
  • a first vibrating shelf for example the shelf 7c
  • the lower shelf for example from 7c to 7b
  • the device 1 comprises heating means 8 suitable for heating a flow of air that passes through them.
  • such heating means 8 comprise one or more heat exchangers, e.g., in the advantageous case illustrated in the appended figures, three heat exchangers, indicated respectively by the numbers 9a, 9b, 9c, comprising, for example, one or more finned batteries supplied by a heat transfer fluid, suitable for heating a flow of air that passes through them.
  • the supply of the heat transfer fluid to one or more finned batteries can be controlled by a suitable thermodynamic circuit, not illustrated, controlled for example by the electronic control means of the device 1.
  • the device 1 comprises ventilation means 10, for example fans 60, preferably with axial flow, adapted to generate one or more air flows, illustrated schematically in figure 3 by arrows 11, which pass through the heating means 8 and the agitation and transport means 6, so as to hit the pasta 5 when it is transported by them, and then cyclically return, at least in part (since a part of such one or more air flows 11 may escape from the containment structure 2 instead of returning to the ventilation means 10), to the ventilation means 10.
  • ventilation means 10 for example fans 60, preferably with axial flow, adapted to generate one or more air flows, illustrated schematically in figure 3 by arrows 11, which pass through the heating means 8 and the agitation and transport means 6, so as to hit the pasta 5 when it is transported by them, and then cyclically return, at least in part (since a part of such one or more air flows 11 may escape from the containment structure 2 instead of returning to the ventilation means 10), to the ventilation means 10.
  • the ventilation means 10 comprise a delivery region 10a, from which the one or more air flows 11 escape, and a suction region 10b, through which at least part of the one or more air flows 11 cyclically re-enter the ventilation means 10; it is underlined that a part of the one or more air flows 11 that is generated by the ventilation means 10 may not cyclically re-enter such ventilation means 10, as, for example, it may be given off outside the containment structure 2.
  • the ventilation means 10 are positioned below the agitation and transport means 6.
  • the one or more air flows 11, after being generated by the ventilation means 10, first pass through a first heat exchanger 9a, heating up, then a first vibrating shelf 7a, yielding heat to such first vibrating shelf 7a and to the pasta 5 contained therein, then a second vibrating shelf 7b, yielding heat to such second vibrating shelf 7b and to the pasta 5 contained therein, then a second heat exchanger 9b, heating up, a third vibrating shelf 7c, releasing heat to said third vibrating shelf 7c and to the pasta 5 contained therein, and finally a third heat exchanger 9c, heating up.
  • the one or more air flows 11 are drawn in from the suction region 10b of the ventilation means 10, re-entering the same and then being discharged from the delivery region 10a of the ventilation means 10 towards the first heat exchanger 9a.
  • a circulation of one or more flows 11 is established within the containment structure 2, affecting the heating means 8, the agitation and transport means 6 (and the pasta 5 contained therein) and the ventilation means 10.
  • the device 1 comprises conveying means 12 suitable for conveying dust 13 carried by the one or more air flows 11 into one or more accumulation and decantation regions 14 present inside the containment structure 2.
  • the one or more accumulation and decantation regions 14 communicate with the outside of the containment structure 2 through one or more discharge openings 17.
  • the conveying means 12 comprise one or more bulkheads 12a positioned to the side of the agitation and transport means 6 for guiding the one or more air flows 11, after their passage through the agitation and transport means 6, and before their return to the ventilation means 10, towards the one or more accumulation and decantation regions 14, in such a way that these one or more air flows 11 deposit therein, by gravity, at least part of the dust 13 present therein.
  • the one or more bulkheads 12a present, in a section operated according to a transverse plane to the device 1, such as, for example, plane III-III of figure 2 , a substantially C-shaped conformation, advantageously with the concavity facing the agitation and transport means 6; in such an advantageous embodiment, a channel 12b is defined between a bulkhead 12a and the contiguous containment structure 2 for the passage of one or more air flows 11, which leads them into one of the one or more accumulation and decantation regions 14.
  • the agitation and transport means 6 comprise one or more vibrating shelves (e.g. the three vibrating shelves 7a, 7b and 7c arranged one above the other, as in the advantageous embodiment illustrated in the appended figures) having a substantially rectangular plan, there are at least two bulkheads 12a, and they are positioned respectively at the two long sides of the two or more shelves (e.g. the shelves 7a, 7b 7c).
  • the one or more accumulation and decantation regions 14 are advantageously positioned below and laterally with respect to the ventilation means 10; thus, the one or more air flows 11, in order to return to the ventilation means 10, must first descend into one of the one or more accumulation and decantation regions 14, and then rise again therefrom, which promotes the decantation and accumulation in that region of the dust 13 contained in the one or more air flows 11.
  • the agitation and transport means 6 comprise one or more vibrating shelves (e.g. the three vibrating shelves 7a, 7b and 7c arranged one above the other, as in the advantageous embodiment illustrated in the appended figures), the one or more accumulation and decantation regions 14 may advantageously be positioned below and laterally with respect to the one or more vibrating shelves (e.g. the three vibrating shelves 7a, 7b and 7c) and the ventilation means 10.
  • the one or more accumulation and decantation regions 14 are at least partially defined by one or more profiles 19 preferably having a concave cross-section, preferably substantially V-shaped, with the vertex facing away from the conveying means 12; such V-shaped conformation promotes the decantation and accumulation of dust 13 near the vertex of the "V" itself.
  • the device 1 also comprises automatic extraction means 15 positioned at least partially in the one or more accumulation and decantation regions 14 to automatically remove dust 13 from them and transport it outside the containment structure 2.
  • the automatic extraction means 15 comprise one or more Archimedean screws 16 arranged in such a way to transport the dust 13 present in said one or more accumulation and decantation regions 14 up to said one or more discharge openings 17, communicating with the outside of the containment structure 2, for example with a dust collection tank 13, not illustrated, external to the device 1.
  • the automatic extraction means 15 advantageously comprise other mechanical systems, such as a conveyor belt, not illustrated, arranged at least partially within an accumulation and decantation region 14, on which the dust 13 is deposited to be transported outside the containment structure 2.
  • the device 1 comprises suction and ejection means 18 of the air contained in the support structure 2 and/or of the air just having left the outlet opening 4.
  • such suction and ejection means 18 comprise one or more suction ports (e.g. a suction port 20 located at the outlet of the outlet opening 4, and a suction port 21 communicating with the inside of the containment structure 2) for sucking in the air contained in the support structure 2 and/or the air just having left the outlet opening 4.
  • suction ports e.g. a suction port 20 located at the outlet of the outlet opening 4, and a suction port 21 communicating with the inside of the containment structure 2 for sucking in the air contained in the support structure 2 and/or the air just having left the outlet opening 4.
  • the suction and ejection means 18 also comprise a piping system 22 for conveying the air sucked in by the one or more suction outlets to a desired region or zone outside the containment structure 2, e.g. the external environment 40.
  • the suction and ejection means 18 include suction means 23, such as a pump, which generate the suction action that causes air to be sucked in from one or more suction ports, and transported through the piping system 22.
  • suction means 23 such as a pump, which generate the suction action that causes air to be sucked in from one or more suction ports, and transported through the piping system 22.
  • the suction and ejection means 18 further comprise sensor means, not illustrated, such as, for example, one or more sensors, not illustrated, adapted to detect the pressure and/or temperature and/or moisture within the containment structure 2, and regulation means, not illustrated, for example a modulation valve, not illustrated, operatively connected to said sensor means, preferably via the electronic control means of the device 1, if present, to regulate the amount of air expelled through the suction and ejection means 18 as a function of the pressure and/or temperature inside the support structure 2.
  • sensor means not illustrated, such as, for example, one or more sensors, not illustrated, adapted to detect the pressure and/or temperature and/or moisture within the containment structure 2
  • regulation means not illustrated, for example a modulation valve, not illustrated, operatively connected to said sensor means, preferably via the electronic control means of the device 1, if present, to regulate the amount of air expelled through the suction and ejection means 18 as a function of the pressure and/or temperature inside the support structure 2.
  • the device 1 comprises means 30 for the selective input of air from the outside to the inside of the containment structure 2, through the inlet opening 3, configured to define an at least partial barrier to the entry of further air, with the exclusion of that introduced by the selective input means 30 themselves, through the inlet opening 3.
  • the selective input means 30 are positioned outside the containment structure 2; in other advantageous embodiments, not illustrated, such selective input means 30 may be positioned inside the containment structure 2, or partially inside and partially outside the containment structure 2.
  • such selective input means 30 comprise means for generating 31 an advantageously heated air blade 32 which enters the inlet opening 3, thereby defining a partial barrier to the entry of further air, with the exclusion of the air blade 32 itself, through the inlet opening 3; this prevents an excessive amount of air, apart from that provided by the air blade 32 itself, from entering the containment structure 2 through the inlet opening 3.
  • the use of the air blade 32 contributes to reduce the overall energy consumption of the device 1, as it prevents an excessive amount of air at room temperature from entering the containment structure 2, cooling the environment inside it and thus requiring the supply of more heat energy through the heating means 8.
  • an excessive amount of air inside the containment structure 2 creates excessive internal pressure, and must therefore be evacuated through the ejection suction means 18, which, in addition to in itself entailing a certain energy expenditure for the activation of such means, leads to a lowering of the temperature inside the containment structure 2, with a consequent need to supply greater thermal power through the heating means 8, and also leads to a reduction of the internal moisture, which could create cracks or other structural or chromatic non-uniformities in the treated pasta 5.
  • the air blade 32 particularly when heated, also helps to thermally insulate the inside of the containment structure 2 from the external environment 40.
  • the device 1 comprises a bypass duct 50 that connects the delivery region 10a of the ventilation means 10 with the inlet opening 3, bypassing the agitation and transport means 6 and the heating means 8.
  • the bypass duct 50 is defined between the inner surface 2a of the containment structure 2 and a wall 70a of a containment enclosure 70, internal to the containment structure 2, which contains at least partially the agitation and transport means 6 and the heating means 8; advantageously, the bypass duct 50 communicates with the delivery region 10a of the ventilation means 10 through one or more through openings 71 formed in the wall 70a of the containment enclosure 70.
  • the agitation and transport means 6 for example, with reference to the attached figures, on the shelf 7c
  • Activating the ventilation means 10 creates, inside the containment structure 2, the circulation of one or more air flows 11, which pass through the heating means 8, heating up, and the pasta 5, heating it and removing moisture from it.
  • the conveying means 12 by creating preferential paths for the circulation of the one or more air flows 11, help to convey the dust 13 transported by such one or more air flows 11 to one or more accumulation and decantation regions 14, where such dust 13 settles due to the effect of gravity, and accumulates, avoiding re-circulation with the air.
  • the automatic extraction means 15 automatically remove such dust 13 from the one or more accumulation and decantation regions 14, transporting it outside the containment structure 2, thereby reducing the risk of such dust 13 circulating again inside the containment structure 2, with the risks that this would entail.
  • the device 1 comprises means 30 for the selective input of air from the outside to the inside of the containment structure 2
  • activating such selective input means 30 creates an at least partial barrier to the entry of further air, to the exclusion of air introduced by the selective input means 30 themselves, through the inlet opening 3.
  • such selective input means 30 comprise means 31 for generating an air blade 32, in particular where such air blade is heated, the air blade also contributes to thermally insulating the inside of the containment structure 2 from the external environment 40.
  • the device 1 comprises suction and ejection means 18, by activating the latter, a part of the air present inside the containment structure 2 and/or the air exiting the outlet opening 4 is sucked in and ejected to a desired region of the external environment 40; in this way, the pressure inside the containment structure 2 is prevented from reaching too high values, which could jeopardise the correct drying of the pasta 5.
  • suction and ejection means 18 comprise the sensor means and the regulation means described above, by means of the sensor means it is possible to regulate the quantity of air ejected through the suction and ejection means 18 as a function of the pressure and/or temperature and/or moisture inside the support structure 2.
  • the pre-drying and mechanical agitation device for the production of pasta solves the above scope and aims; in fact, thanks to the dust conveying and automatic removal means, the risk of dust decantation on the various internal components of the containment structure, in particular on the heat exchangers, compromising their operation and/or performance, is greatly reduced, thus reducing the need for maintenance, and consequently machine downtime, and related costs.
  • the automatic removal of dust directly from one or more accumulation and decantation regions reduces the need for dust filters to filter the air leaving the device, and the frequency of maintenance and/or replacement of any filter provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
EP23159671.9A 2022-03-04 2023-03-02 Dispositif de pré-séchage et d'agitation mécanique pour la production de pâtes alimentaires Pending EP4239269A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102022000004148A IT202200004148A1 (it) 2022-03-04 2022-03-04 Dispositivo di pre-essiccazione e agitazione meccanica per la produzione della pasta.

Publications (1)

Publication Number Publication Date
EP4239269A1 true EP4239269A1 (fr) 2023-09-06

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EP23159671.9A Pending EP4239269A1 (fr) 2022-03-04 2023-03-02 Dispositif de pré-séchage et d'agitation mécanique pour la production de pâtes alimentaires

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EP (1) EP4239269A1 (fr)
IT (1) IT202200004148A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE168021C (fr) * 1905-02-26 1906-02-24
US6269550B1 (en) * 1997-02-12 2001-08-07 Comas S.P.A. Drying machine for shredded tobacco, in particular for rolls of expanded shredded tobacco
CN1072893C (zh) * 1992-03-27 2001-10-17 布勒公司 挤压和烘干面食产品的方法和装置
US20090300935A1 (en) * 2005-04-29 2009-12-10 Fabio Paron Chamber dryer with uniform treatment parameters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE168021C (fr) * 1905-02-26 1906-02-24
CN1072893C (zh) * 1992-03-27 2001-10-17 布勒公司 挤压和烘干面食产品的方法和装置
US6269550B1 (en) * 1997-02-12 2001-08-07 Comas S.P.A. Drying machine for shredded tobacco, in particular for rolls of expanded shredded tobacco
US20090300935A1 (en) * 2005-04-29 2009-12-10 Fabio Paron Chamber dryer with uniform treatment parameters

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Publication number Publication date
IT202200004148A1 (it) 2023-09-04

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