EP0824964B1 - Broyeur agitateur - Google Patents
Broyeur agitateur Download PDFInfo
- Publication number
- EP0824964B1 EP0824964B1 EP97112210A EP97112210A EP0824964B1 EP 0824964 B1 EP0824964 B1 EP 0824964B1 EP 97112210 A EP97112210 A EP 97112210A EP 97112210 A EP97112210 A EP 97112210A EP 0824964 B1 EP0824964 B1 EP 0824964B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- chamber
- exterior
- gap width
- interior
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
Definitions
- the invention relates to an agitator mill according to the preamble of the claim 1.
- Such an agitator mill is known from DE 40 10 926 A1. at this known agitator mill are the boundary walls of the grinding chamber smooth-walled, so they have no stirring tools.
- the regrind flows through a regrind feed area, through a transition area overflow channels into the outside grinding chamber and through the Deflection room into the interior grinding room.
- the grinding aids run in a circle through the outside grinding area, the deflection area, the inside grinding area and the overflow channels back into or into the outside grinding chamber opening transition area.
- the regrind flows from the end of the Internal grinding room for the separating device.
- the grinding gap width, i. H. the radial width of the grinding chamber is constant. It follows from this that the Shear gradient in the outside grinding chamber is greater than in the inside grinding room.
- the shear gradient is defined as the quotient of Speed of the rotating surface and the gap width.
- the grinding gap width is also undefined. This well-known agitator mill is easy to clean due to the lack of stirring tools.
- the invention has for its object the agitator mill of the generic type Kind so to design that grinding and dispersing predominantly by shear effects in such a way that the local stress intensity of the ground material over the entire grinding path essentially is constant.
- the deflection space as a buffer volume for auxiliary grinding bodies serve.
- the enlarged compared to the cross section of the outside grinding room Cross-section of the deflection chamber facilitates the flow of the ground material and in particular the grinding auxiliary body against the centrifugal force radially inside into the grinding room. If according to claim 5 in Transitional area into which the overflow channels open, as it were Recess is formed in the agitator, thereby reducing wear serving free space created.
- the configuration according to claim 9 ensures that the separating device not to an appreciable extent for separating grinding aids on the one hand and regrind on the other. Still the term “Separating device” is used because it is common in the technical language has prevailed. The auxiliary grinding bodies are separated from the regrind very much before the separator.
- the agitator mill shown in Fig. 1 has in the usual way Stand 1 on which a cylindrical grinding container 3 can be attached.
- an electric drive motor 4 housed with a V-belt pulley 5 is provided, one of which via V-belt 6 a drive shaft 7 rotatably connected V-belt pulley 8 rotating is drivable.
- the grinding container 3 consists of a cylindrical, a grinding chamber 9 surrounding inner wall 10, the a substantially cylindrical outer shell 11 is surrounded.
- the Inner cylinder 10 and the outer jacket 11 delimit one between them Cooling room 12.
- the lower end of the grinding chamber 9 is an annular Base plate 13 formed on the grinding container by means of screws 14 is attached.
- the grinding container 3 has an upper ring flange 15, by means of which it is fastened to the underside of a support housing 16 by means of screws 17, which is attached to stand 1 of the agitator mill.
- the grinding chamber 9 is closed by a lid 18.
- the support housing 16 has a medium Bearing and seal housing 19, which is coaxial to the central longitudinal axis 20 of the grinding container 3 is arranged. This seal housing 19th is driven by the drive shaft 7, which also runs coaxially to the axis 20 enforced, on which an agitator 21 is attached. In the grinding room 9 adjacent area of the seal housing 19 opens a regrind feed line 22 a.
- the cooling space 28 is connected to a cooling space 29 in the base plate 13, the cooling water is supplied via a cooling water supply nozzle 30 which via an outlet pipe 30a is discharged.
- the cooling chamber 12 of the grinding container 3 cooling water is supplied via a cooling water supply nozzle 31, which is discharged via a cooling water discharge nozzle 32.
- a grinding material-grinding body separating device 34 is arranged, which is connected to a regrind drain line 35. Between the separating device 34 and the drain line 35 is a regrind collecting funnel 36 provided.
- the drain line 35 is in the range of Base plate 13 provided with a bracket 38, which by means of screws 39 with the base plate 13 or the inner stator fixedly connected to it 24 is releasably connected.
- the separating device 34 is opposite to the annular end face 33 of the inner stator 24 by means of a seal 40 sealed and after loosening the screws 39 together with the Drain line 35 and the collecting funnel 36 from the inner stator 24 after pulled out below.
- the separator 34 can thus from the Grinding chamber 9 are pulled out without the located in it Grinding auxiliary body 41 must be removed from the grinding chamber, since the Filling the grinding chamber 9 with these auxiliary grinding bodies 41 when not driven Agitator 21 does not reach the front side 33.
- the basic structure of the agitator 21 is pot-shaped, i.e. it shows one essentially ring-cylindrical rotor 42 by a cylindrical Outer wall 43 and a coaxial to this and coaxial to the axis 20 cylindrical inner wall 44 is formed. Between the outer wall 43 and the inner wall 44 of the rotor 42, a cooling space 45 is formed.
- the rotor 42 is attached to a rotor support member 46 which is connected to the Wave 7 is connected.
- the supply and discharge of cooling water to the cold room 45 takes place via in the shaft 7 and formed in the rotor support member 46 Cooling water channels 47, 48.
- the grinding chamber 9 is in a cylindrical ring Outside grinding chamber 9 'on the one hand and a cylindrical ring Internal grinding chamber 9 ", on the other hand, divided by a deflection chamber 49 are connected to one another in the area of the base plate 13.
- the outer wall 43 and the outer casing 26 are formed grinding chamber boundary walls none protruding into the outer grinding chamber 9 'or the inner grinding chamber 9 " Stirring tools attached.
- the ground material flows through the grinding chamber 9 corresponding to the flow direction arrows 52 from the regrind feed line 22 coming through a regrind feed space 53 between the rotor support part 46 on the one hand and the cover 18 and the adjacent one Region of the inner wall 10, on the other hand, the outer grinding chamber 9 'downwards, through the deflection chamber 49 radially inwards and from there through the Inside grinding chamber 9 "up to the separator 34.
- the deflection chamber 49 and the inner grinding chamber 9 "becomes the regrind when the agitator 21 is driven in rotation ground in cooperation with the auxiliary grinding bodies 41.
- the regrind leaves the grinding chamber 9 through the separating device 34, from where it passes through the regrind drain line 35 flows off.
- the overflow channels 61 are located in the rotor support part 46, and that is how Fig. 3 can be removed - in the transition region of the rotor support member 46 to cylindrical rotor 42 and - in the direction of flow direction arrows 52 seen - in front of the separator 34. They connect - based on the Flow direction according to the flow direction arrows 52 - that End of the inner grinding chamber 9 "with the beginning of the outer grinding chamber 9 ', thus with a transition area 62 of the regrind feed space 53, which in merges with the outside grinding chamber 9 '.
- the inlet areas 60 are down to the inner grinding chamber 9 "open, so that by the driver 59 conveyor blades are formed in the inlet area 60, as it were, the grinding aid body 41 after reaching the separating device 34 after Spin outside and back into the transition area 62 between the regrind feed area 53 and transport the outside grinding chamber 9 'back.
- the outer grinding chamber 9 'and the Internal grinding chamber 9 "designed as grinding gaps; this applies to all embodiments 2 to 6.
- the rotor support member 46 has a cylindrical portion 65 between the and the facing area of the inner wall 10 of the grinding container 3 an annular cylindrical closing gap 66 with a gap width a is formed.
- the likewise ring-cylindrical transition region 62 which is concentric extends to the axis 20 around the overflow channels 61, has a - related on axis 20 - radial width b.
- the outer grinding chamber 9 ' is also formed annular cylindrical and has an outer grinding gap width c.
- the deflection space 49 has an extension d parallel to the axis 20. By a suitable choice of this extension d, the deflection space 49 becomes a buffer space for grinding auxiliary bodies 41.
- the internal grinding chamber 9 ′′ which is also in the form of an annular gap, has an internal grinding gap width e radial to axis 20.
- outer grinding gap width c 2.0mm ⁇ c ⁇ 10mm and preferred 3.0 mm ⁇ c ⁇ 6.0 mm, the choice of the outer grinding gap width c being determined, inter alia, by the size of the auxiliary grinding bodies 41, whose diameter f is in the range from 0.2 to 1.0 and in the limit case up to 2.0 mm.
- the adjustment of the outer grinding gap width c with regard to the size or the diameter f of the auxiliary grinding bodies 41 takes place in such a way that the desired shear processes, ie the Desired grinding effects occur, the required entrainment forces being exerted by adhesion to the auxiliary grinding bodies 41 and the ground material from the smooth-walled boundary walls of the outer grinding chamber 9 'and the inner grinding chamber 9 ".
- a generally laminar flow similar to a Couette flow, is generated between the respective standing and the moving boundary wall. This leads to the comminution or dispersion the ground material is preferably carried out by a shear mechanism.
- the gap width a of the closing gap 66 should always be smaller than the outer grinding gap width c, so that the auxiliary grinding bodies 41 do not reach the upper region of the grinding material feed chamber 53, but in any case enter the outer grinding chamber 9 '.
- the shear is greater than in the outside grinding chamber 9 ', so that the local shear gradient in the closing gap 66 is higher than in the outside grinding chamber 9'. Since the auxiliary grinding bodies 41 want to escape the higher shear gradient, they flow reliably into the external grinding chamber 9 ', supported by the entrainment effect from the incoming material.
- the width b of the transition area 62 c applies in comparison to the outer grinding gap width c ⁇ b ⁇ 3c and preferred 2c ⁇ b ⁇ 3c. If the radial width b of the transition area 62 is greater than the outer grinding gap width c, then in this area there is a considerable reduction in wear at the trailing edge 61a of the overflow channels 61, since the transition area 62 forms a certain free space for the auxiliary grinding bodies 41 , In addition, the impact of the auxiliary grinding bodies on the inner wall 10 is alleviated.
- c applies in relation to the outer grinding gap width c ⁇ d ⁇ 3c and preferred 2c ⁇ d ⁇ 3c.
- the larger d is in the given frame, the larger it is in the deflection space 49 buffer volumes formed for auxiliary grinding bodies and the lighter the regrind and in particular the grinding auxiliary bodies 41 flow against the Centrifugal force radially inwards towards the inner grinding chamber 9 ".
- the smaller d is within the specified range, the stronger the grinding effect in this area.
- the inner stator 24 ' is further pulled up with a corresponding axial shortening of the separating device 34', so that the inner stator 24 'partially covers the overflow channels 61' in the direction of the axis 20 in the region of its end face 33.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Claims (9)
- Broyeur agitateur pour le traitement de matière à broyer coulante comprenant un conteneur de broyage (3) limitant un espace de broyage (9) fermé dans une large mesure par une paroi (10) et un agitateur (21) disposé dans celui-ci de manière rotative, conformé comme un pot par rapport à un axe longitudinal central (20) commun avec un rotor (42) cylindrique annulaire dans lequel est disposé un stator intérieur (24) relié fixement avec le conteneur de broyage (3), dans lequel un espace de broyage extérieur (9') cylindrique annulaire est conformé entre la paroi (10) du conteneur de broyage (3) et une paroi extérieure (43) du rotor (42), et un espace de broyage intérieur (9") cylindrique annulaire, disposé de manière coaxiale à l'intérieur de l'espace de broyage extérieur (9') et relié à celui-ci par un espace de déviation (49), est conformé entre une paroi intérieure (44) du rotor (42) et une enveloppe extérieure (26) du stator intérieur (44), dans lequel l'espace de broyage extérieur (9'), l'espace de déviation (49) et l'espace de broyage intérieur (9") forment l'espace de broyage (9) partiellement rempli de corps auxiliaires de broyage (41), dans lequel un espace d'amenée (53) de la matière à broyer placé avant l'espace de broyage extérieur (9') et débouchant dans celui-ci dans le sens d'écoulement (52) de la matière à broyer et un dispositif de séparation (34, 34') placé après l'espace de broyage intérieur (9") dans le sens d'écoulement (52) de la matière à broyer pour le passage de la matière à broyer sont disposés sur le même côté du conteneur de broyage (3), dans lequel il est prévu des canaux de trop-plein (61, 61') dans l'agitateur (21) pour le retour des corps auxiliaires de broyage (41) de la région du dispositif de séparation (34, 34') dans la région de l'espace d'amenée (53) de la matière à broyer, lesquels relient l'extrémité de l'espace de broyage intérieur (9") au début de l'espace de broyage extérieur (9') et sont disposés - par rapport au sens d'écoulement (52) de la matière à broyer - avant le dispositif de séparation (34, 34'), dans lequel l'espace de broyage extérieur (9') et l'espace de broyage intérieur (9") sont conformés respectivement en forme d'anneau avec une largeur c de fente de broyage extérieure et une largeur e de fente de broyage intérieure, et dans lequel la paroi (10) du conteneur de broyage (3), la paroi extérieure (43) du rotor (42), la paroi intérieure (44) du rotor (42) et l'enveloppe extérieure (26) du stator intérieur (24) sont conformées de manière lisse, libre d'outils agitateurs,
caractérisé en ce que la largeur c de la fente de broyage extérieure de l'espace de broyage extérieur (9') en forme de fente annulaire doit avoir comme dimension 2,0 mm ≤ c ≤ 10,0 mm et en ce que la largeur e de la fente de broyage intérieure de l'espace de broyage intérieur (9") en forme de fente annulaire par rapport à la largeur c de la fente de broyage extérieur doit avoir comme dimension 0,5c ≤ e ≤ c. - Broyeur agitateur selon la revendication 1, caractérisé en ce que la largeur c de la fente de broyage extérieure doit avoir comme dimension 3,0 mm ≤ c ≤ 6,0 mm.
- Broyeur agitateur selon la revendication 1 ou 2, caractérisé en ce que l'espace de déviation (49) a une étendue d parallèle à l'axe (20) qui, par rapport à la largeur c de la fente de broyage extérieure, doit avoir comme dimension c ≤ d ≤ 3c.
- Broyeur agitateur selon la revendication 3, caractérisé en ce que l'espace de déviation (49) a une étendue d parallèle à l'axe (20) qui, par rapport à la largeur c de la fente de broyage extérieure, doit avoir comme dimension 2c ≤ d ≤ 3c.
- Broyeur agitateur selon une des revendications 1 à 4, caractérisé en ce que les canaux de trop-plein (61, 61') débouchent dans une zone de passage (62) de l'espace d'amenée (53) de la matière à broyer au niveau du passage à l'espace de broyage extérieur (9'), une largeur b de la zone de passage (62) par rapport à la largeur c de la fente de broyage extérieure devant avoir comme dimension c ≤ b ≤ 3c.
- Broyeur agitateur selon une des revendications 1 à 5, caractérisé en ce que l'agitateur (21) présente une section (65) cylindrique disposée - par rapport au sens d'écoulement (52) de la matière à broyer - avant les canaux de trop-plein (61, 61'), limitant avec la paroi intérieure (10) du conteneur de broyage (3) une fente d'arrêt (66) dont la largeur a de fente par rapport à la largeur c de la fente de broyage extérieure doit avoir comme dimension 0,4c ≤ a ≤ 0,8c.
- Broyeur agitateur selon une des revendications 1 à 5, caractérisé en ce que les corps auxiliaires de broyage (41) ont un diamètre f qui, par rapport à la largeur c de la fente de broyage extérieure, doit avoir comme dimension 2f ≤ c ≤ 10f.
- Broyeur agitateur selon la revendication 7, caractérisé en ce que le diamètre f des corps auxiliaires de broyage (41), par rapport à la largeur c de la fente de broyage extérieure, doit avoir comme dimension 3f ≤ c ≤ 6f.
- Broyeur agitateur selon une des revendications 1 à 8, caractérisé en ce que les canaux de trop-plein (61, 61') s'étendent radialement par rapport à l'axe longitudinal central (20).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19632757A DE19632757A1 (de) | 1996-08-14 | 1996-08-14 | Rührwerksmühle |
DE19632757 | 1996-08-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824964A1 EP0824964A1 (fr) | 1998-02-25 |
EP0824964B1 true EP0824964B1 (fr) | 2002-03-27 |
Family
ID=7802612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112210A Expired - Lifetime EP0824964B1 (fr) | 1996-08-14 | 1997-07-17 | Broyeur agitateur |
Country Status (9)
Country | Link |
---|---|
US (1) | US5950943A (fr) |
EP (1) | EP0824964B1 (fr) |
JP (1) | JP3335294B2 (fr) |
KR (1) | KR100494851B1 (fr) |
CN (1) | CN1091004C (fr) |
DE (2) | DE19632757A1 (fr) |
ES (1) | ES2175229T3 (fr) |
IN (1) | IN192955B (fr) |
TW (1) | TW340060B (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19834397B4 (de) * | 1997-10-28 | 2007-04-05 | BüHLER GMBH | Rührwerksmühle |
EP0913200B1 (fr) | 1997-10-28 | 2003-04-23 | DRAISWERKE GmbH | Broyeur agitateur |
DE19819967B4 (de) * | 1998-05-05 | 2007-04-26 | BüHLER GMBH | Rührwerksmühle |
DE19912594B4 (de) * | 1999-03-20 | 2008-01-31 | Zoz Gmbh | Vorrichtung zur Hochenergie- und/oder Feinstmahlung von Feststoffen |
JP4081785B2 (ja) * | 1999-07-29 | 2008-04-30 | 株式会社井上製作所 | 浸漬型分散機 |
PT1313564E (pt) * | 2000-04-26 | 2010-01-11 | Elan Pharma Int Ltd | Aparelho para moagem sanitária por via húmida |
EP1867394A3 (fr) * | 2000-04-26 | 2008-03-05 | Elan Pharma International Ltd. | Appareil pour concassage humide hygiénique |
JP4451965B2 (ja) * | 2000-05-18 | 2010-04-14 | 株式会社井上製作所 | パイプラインビ−ズミル |
ES2285603T3 (es) * | 2005-05-19 | 2007-11-16 | Buhler Ag | Molino agitador. |
US7699250B1 (en) * | 2007-03-02 | 2010-04-20 | Progressive Industries, Inc. | Media grinding mill |
EP2307145B1 (fr) * | 2008-07-10 | 2018-05-23 | Frewitt fabrique de machines S.A. | Broyeur de perles à séparateur |
CN104869876B (zh) * | 2012-12-21 | 2019-04-30 | 雀巢产品技术援助有限公司 | 用于产生奶泡的装置 |
JP5404955B1 (ja) | 2013-06-03 | 2014-02-05 | アシザワ・ファインテック株式会社 | 媒体攪拌型粉砕機 |
CN104190504A (zh) * | 2014-08-15 | 2014-12-10 | 广州派勒机械设备有限公司 | 高性能超级流量纳米砂磨机 |
DE102015105804A1 (de) * | 2015-04-16 | 2016-10-20 | Netzsch-Feinmahltechnik Gmbh | Rührwerkskugelmühle |
EP3536406A1 (fr) * | 2018-03-07 | 2019-09-11 | Bühler AG | Moulin à agitateur |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4225092A (en) * | 1977-11-22 | 1980-09-30 | Microprocess Ltd. | Annular grinding mill |
DE3015631A1 (de) * | 1980-04-23 | 1981-10-29 | Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb | Ruehrwerksmuehle |
DE3106062A1 (de) * | 1981-02-19 | 1982-09-09 | Draiswerke Gmbh, 6800 Mannheim | Ruehrwerksmuehle |
DE3444575A1 (de) * | 1984-12-06 | 1986-06-12 | Fryma-Maschinen Ag, Rheinfelden | Kugelmuehle |
GB8431294D0 (en) * | 1984-12-12 | 1985-01-23 | Smidth & Co As F L | Controlling intermittant voltage supply |
JPS63122642U (fr) * | 1987-01-30 | 1988-08-09 | ||
DE3716587C1 (de) * | 1987-05-18 | 1988-04-28 | Draiswerke Gmbh | Ruehrwerksmuehle |
DE4002613A1 (de) * | 1990-01-30 | 1991-08-01 | Draiswerke Gmbh | Ruehrwerksmuehle |
DE4010926A1 (de) * | 1990-04-04 | 1991-10-10 | Fryma Masch Ag | Ruehrwerksmuehle |
JPH07106310B2 (ja) * | 1991-12-13 | 1995-11-15 | 株式会社井上製作所 | 媒体分散機 |
DE4402609C2 (de) * | 1994-01-28 | 1997-05-07 | Hosokawa Alpine Ag | Rührwerkskugelmühle |
-
1996
- 1996-08-14 DE DE19632757A patent/DE19632757A1/de not_active Withdrawn
-
1997
- 1997-07-17 EP EP97112210A patent/EP0824964B1/fr not_active Expired - Lifetime
- 1997-07-17 ES ES97112210T patent/ES2175229T3/es not_active Expired - Lifetime
- 1997-07-17 DE DE59706734T patent/DE59706734D1/de not_active Expired - Lifetime
- 1997-07-23 IN IN1381CA1997 patent/IN192955B/en unknown
- 1997-08-05 US US08/906,043 patent/US5950943A/en not_active Expired - Lifetime
- 1997-08-08 TW TW086111393A patent/TW340060B/zh not_active IP Right Cessation
- 1997-08-13 CN CN97117642A patent/CN1091004C/zh not_active Expired - Lifetime
- 1997-08-13 JP JP21870097A patent/JP3335294B2/ja not_active Expired - Fee Related
- 1997-08-14 KR KR1019970038984A patent/KR100494851B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP3335294B2 (ja) | 2002-10-15 |
JPH1076172A (ja) | 1998-03-24 |
TW340060B (en) | 1998-09-11 |
DE59706734D1 (de) | 2002-05-02 |
KR19980018705A (ko) | 1998-06-05 |
CN1176850A (zh) | 1998-03-25 |
DE19632757A1 (de) | 1998-02-19 |
US5950943A (en) | 1999-09-14 |
EP0824964A1 (fr) | 1998-02-25 |
IN192955B (fr) | 2004-06-19 |
KR100494851B1 (ko) | 2005-10-28 |
CN1091004C (zh) | 2002-09-18 |
ES2175229T3 (es) | 2002-11-16 |
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