EP0990865A2 - Messsystem zur Bestimmung des Feuchtigkeitsgehaltes einer Faserstoffbahn - Google Patents
Messsystem zur Bestimmung des Feuchtigkeitsgehaltes einer Faserstoffbahn Download PDFInfo
- Publication number
- EP0990865A2 EP0990865A2 EP99113968A EP99113968A EP0990865A2 EP 0990865 A2 EP0990865 A2 EP 0990865A2 EP 99113968 A EP99113968 A EP 99113968A EP 99113968 A EP99113968 A EP 99113968A EP 0990865 A2 EP0990865 A2 EP 0990865A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring system
- fibrous web
- roller
- radiation
- moisture content
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
-
- 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
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/06—Moisture and basic weight
Definitions
- the invention relates to a measuring system for determining the moisture content of a Paper, textile or other fibrous web in a machine for production and / or finishing the fibrous web in an area of the machine in which the Fibrous web without free draft, d. H. does not run unsupported.
- the measuring systems known hitherto allow the moisture content to be measured predominantly only in long, free passages of the fibrous web. Because of the increasing speeds, however, a closed, ie supported, guidance of the fibrous web is increasingly important. From DE-OS 43 25 915, for example, a method is known in which air flows through the fibrous web. Based on the temperature comparison of the incoming and outgoing air, the moisture content of the fibrous web is inferred. This is particularly inaccurate at high web speeds or not applicable in areas without free train.
- the object of the invention is therefore to provide a measuring system which Measurement of the moisture content of the fibrous web allowed even without free draft.
- the object was achieved in that the measurement in one Area takes place in which the fibrous web on an essentially water-free, residing surface.
- the water-free surface ensures as little distortion as possible Measurement result.
- the measurement should be based on certain radiations take place, the degree of absorption of radiation from the water of the fibrous web is measured as a measure of the moisture content thereof. It can transmitters and receivers of radiation on different or the same side of the Fibrous web be arranged.
- the strength of the radiation penetrating the fibrous web and at least the water-free surface is measured and in the second case the strength of the reflected radiation is measured.
- Infrared emitters with one or more wavelengths and / or radioactive rays are particularly suitable for the measurement.
- the essentially water-free surface can be formed by a particularly smooth rotating roller, preferably in the form of a drying cylinder, a press roller, a measuring roller or a guide roller.
- the transmitter and / or receiver of the radiation can be arranged inside the roller and preferably fixed at least in the circumferential direction.
- the roller shell of the roller is designed to be optically transparent at least at one point on the peripheral surface running past the transmitter and receiver.
- the roller designed as a guide roller, has an optically permeable roller shell, preferably made of plastic.
- the transmitter and / or receiver for the radiation to be accommodated in the roll shell of the roll.
- the transmitter and / or receiver of the radiation should have an optically transparent cover that does not protrude beyond the surface of the roller.
- a roller you can also use a to form a water-free surface especially smooth, moving belt in the form of a transfer or press belt for Bring effort.
- the surface of the belt or roller can also be profiled for example, be grooved or blind drilled. Also come into question Suction rolls with perforated roll jacket. There is also the possibility the essentially water-free surface of a relatively heavily dried sieve or to form felt tape.
- the moisture content of the is advantageously measured Fibrous web at the end and / or after the press section and / or in the Dryer section, in particular between the first and second dryer groups, and / or in the area of a smoothing unit.
- the transmitter and / or the Receivers of radiation can be arranged traversing. It is also possible across to provide several transmitters and / or receivers for the fibrous web.
- the moisture content of the fibrous web 1 in is measured a machine for producing the fibrous web 1 in an area in which the Fibrous web 1 without a free train, d. H. is not unsupported, the Fibrous web 1 on a substantially water-free, moving surface lies on.
- the measurement is based on infrared radiation with one or more Wavelengths or based on weak radioactive radiation.
- the degree of absorption of the radiation from the water is essential Fiber web 1 measured as a measure of the moisture content.
- the fibrous web 1 is transferred from a felt belt 7 to an endless wire belt 6 pass what is supported by a suction guide roller 13 of the belt 6.
- the moisture content is then measured using a transmitter 2 and a receiver 3 of infrared radiation, with transmitter 2 and receiver 3 on Different sides of the fibrous web 1 and the sieve belt 6 are arranged.
- the sieve belt 6 must ensure a as dry as possible water-free surface, which is heated here Guide rollers 8 is reached.
- the fibrous web 1 is then attached to an unheated, smooth and rotating roller 4 passed to the following dryer group.
- the essentially water-free surface the roller 4 can also be used to measure the moisture content of the Fiber web 1 can be used.
- the measurement via a transmitter 2 is an example here of weak, radioactive radiation, which is inside the roller located. Outside the roller 4, the receiver is located opposite the transmitter 2 3 of radiation.
- the roller 4 passes the fibrous web 1 to a dryer fabric in the following 9 from which the fibrous web 1 alternately via guide rollers 11 and heated Drying cylinder 10 of the drying group leads.
- the transmitter 2 and the Receiver 3 of the radiation arranged on the same side of the fibrous web 1. It the proportion of reflected radiation is consequently measured.
- the fibrous web 1 is here from a moving, smooth belt 5 in the form of a Transfer ribbon to a press felt 12, which is also from a vacuum Guide roller 13 is supported. Since the smooth band 5 has an anhydrous surface, can, as shown in Figure 2, before the transfer, the measurement of Moisture content arranged on the free side of the fibrous web 1 Infrared transmitters and receivers 2,3 happen.
- the fibrous web 1 is together with the endless press felt 12 by one of two rollers 4, 14 formed press nip, the squeezed water from Press felt 12 is picked up and carried away. After the press nip runs Fibrous web 1 on the smooth roll 4 not wrapped by the press felt 12 to Transfer to a transfer sieve 17.
- the measurement on the sieve belt 6 and on the belt 5 is carried out by means of traversing transmitters 2 and receivers 3.
- a plurality of transmitters 2 and receivers 3 are arranged along the roller 4.
- the arrangement of the measuring system between the drying groups is as in FIG. 1 shown possible.
- the described way of measuring the Moisture content in the range of 30-75% dry, especially 30-65% dry.
- Figure 3 shows a schematic cross section through a roller 4, in which several axially adjacent combinations of infrared transmitters 2 and infrared receivers 3 are arranged in the roll shell 19 of the roll 4.
- channels 2 and receiver 3 protected by an optically transparent cover 18, which with the Cladding surface of the roller 4 completes.
- the transmitters 2 arranged side by side and receiver 3 allow the measurement of the moisture content across Fibrous web 1 to a sufficient extent. Also rotating transmitter 2 and Receiver 3 provides because of the high speed and the associated high Measurement frequency is not a problem. An evaluation of the measurement is therefore only possible if the fibrous web 1 is in the range of transmitter 2 and receiver 3.
- the combinations arranged side by side in FIG. 4 are of transmitter 2 and receiver 3 inside the roller 4 axially and in the circumferential direction arranged fixed.
- the roller jacket 19 of the roller 4 is in each case at one point which, passing by the combination of transmitter 2 and receiver 3 Circumferential surface optically permeable. These places are for guarantee sufficient stability of the roller 4 in the circumferential direction to each other arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Aus der DE-OS 43 25 915 ist beispielsweise ein Verfahren bekannt, bei dem die Faserstoffbahn von Luft durchströmt wird. Anhand des Temperaturvergleichs der einströmenden und der ausströmenden Luft wird dabei auf den Feuchtigkeitsgehalt der Faserstoffbahn geschlossen. Dies ist insbesondere bei hohen Bahngeschwindigkeiten zu ungenau bzw. in Bereichen ohne freien Zug nicht anwendbar.
Zur Messung eignen sich insbesondere Infrarot-Strahler mit einer oder mehreren Wellenlängen und/oder radioaktive Strahlen.
Die im wesentlichen wasserfreie Oberfläche kann dabei von einer insbesondere glatten rotierenden Walze vorzugsweise in Form eines Trockenzylinders, einer Preßwalze, einer Meßwalze oder einer Leitwalze gebildet werden.
In diesem Fall können Sender und/oder Empfänger der Strahlung im Inneren der Walze angeordnet und vorzugsweise zumindest in Umfangsrichtung fixiert sein. Insbesondere beim Einsatz von Infrarot-Strahlern ist es dabei für die Meßgenauigkeit von Vorteil, wenn der Walzenmantel der Walze zumindest an einer Stelle der an Sender und Empfänger vorbeilaufenden Umfangsfläche optisch durchlässig gestaltet ist.
Es ist jedoch auch möglich, daß Sender und/oder Empfänger der Strahlung im Walzenmantel der Walze untergebracht sind. Hierbei sollte Sender und/oder Empfänger der Strahlung eine optisch durchlässige Abdeckung besitzen, die nicht über die Manteloberfläche der Walze hinausragt.
In Figur 2 sind entlang der Walze 4 mehrere Sender 2 und Empfänger 3 angeordnet. Dies ist jedoch nur beispielhaft zu betrachten.
Außerdem können natürlich auch mehrere axial verlaufende Reihen von Kombination aus Sender 2 und Empfänger 3 in der Walz 4 vorgesehen sein.
Claims (17)
- Meßsystem zur Bestimmung des Feuchtigkeitsgehaltes einer Papier-, Textil- oder einer anderen Faserstoffbahn (1) in einer Maschine zur Herstellung und/oder Veredlung der Faserstoffbahn (1) in einem Bereich der Maschine in dem die Faserstoffbahn (1) ohne freien Zug, d. h. nicht ungestützt verläuft,
dadurch gekennzeichnet, daß
die Messung in einem Bereich erfolgt, in dem die Faserstoffbahn (1) auf einer im wesentlichen wasserfreien, mitlaufenden Oberfläche aufliegt. - Meßsystem nach Anspruch 1,
dadurch gekennzeichnet, daß
die Messung auf der Basis von Infrarot-Strahlung mit einer oder mehreren Wellenlängen erfolgt. - Meßsystem nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die Messung auf der Basis radioaktiver Strahlung erfolgt. - Meßsystem nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß
der Grad der Absorption der Strahlung vom Wasser der Faserstoffbahn (1) als Maß des Feuchtigkeitsgehaltes derselben gemessen wird. - Meßsystem nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, daß
Sender (2) und Empfänger (3) der Strahlung auf verschiedenen Seiten der Faserstoffbahn (1) angeordnet sind. - Meßsystem nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, daß
Sender (2) und Empfänger (3) der Strahlung auf derselben Seite der Faserstoffbahn (1) angeordnet sind. - Meßsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
die wasserfreie Oberfläche von einer rotierenden, insbesondere glatten Walze (4) vorzugsweise in Form eines Trockenzylinders, einer Preßwalze oder einer Leitwalze gebildet wird. - Meßsystem nach Anspruch 7, dadurch gekennzeichnet, daß
Sender (2) und/oder Empfänger (3) der Strahlung im Innern der Walze (4) angeordnet und vorzugsweise in Umfangsrichtung fixiert sind. - Meßsystem nach Anspruch 8, dadurch gekennzeichnet, daß
der Walzenmantel der Walze (4) zumindest an einer Stelle der an Sender (2) und Empfänger (3) vorbeilaufenden Umfangsfläche optisch durchlässig gestaltet ist. - Meßsystem nach Anspruch 8, dadurch gekennzeichnet, daß
der gesamte Walzenmantel 19 optisch durchlässig gestaltet ist. - Meßsystem nach Anspruch 7, dadurch gekennzeichnet, daß
Sender (2) und/oder Empfänger (3) der Strahlung im Walzenmantel (19) der Walze (4) angeordnet sind. - Meßsystem nach Anspruch 11, dadurch gekennzeichnet, daß
Sender (2) und/oder Empfänger (3) der Strahlung eine optisch durchlässige Abdeckung 18 besitzen, die nicht über die Manteloberfläche der Walze (4) hinausragt. - Meßsystem nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß
die wasserfreie Oberfläche von einem mitlaufenden, insbesondere glatten Band (5) in Form eines Transfer- oder Preßbandes gebildet wird. - Meßsystem nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß
die wasserfreie Oberfläche von einem getrockneten, mitlaufenden Sieb- oder Filzband (6) gebildet wird. - Meßsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
die Messung des Feuchtigkeitsgehaltes der Faserstoffbahn (1) am Ende und/oder nach der Pressenpartie und/oder in der Trockenpartie, insbesondere zwischen der ersten und der zweiten Trockengruppe und/oder im Bereich eines Glättwerkes erfolgt. - Meßsystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
Sender (2) und/oder Empfänger (3) der Strahlung traversierend angeordnet sind. - Meßsystem nach einem der Ansprüche 1 bis 15,
dadurch gekennzeichnet, daß
quer zur Faserstoffbahn (1) mehrere Sender (2) und/oder Empfänger (3) nebeneinander angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19844927A DE19844927A1 (de) | 1998-09-30 | 1998-09-30 | Meßsystem |
DE19844927 | 1998-09-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0990865A2 true EP0990865A2 (de) | 2000-04-05 |
EP0990865A3 EP0990865A3 (de) | 2001-12-05 |
EP0990865B1 EP0990865B1 (de) | 2005-10-12 |
Family
ID=7882854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113968A Expired - Lifetime EP0990865B1 (de) | 1998-09-30 | 1999-07-17 | Messsystem zur Bestimmung des Feuchtigkeitsgehaltes einer Faserstoffbahn |
Country Status (3)
Country | Link |
---|---|
US (1) | US6254726B1 (de) |
EP (1) | EP0990865B1 (de) |
DE (2) | DE19844927A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT522782B1 (de) * | 2019-12-19 | 2021-02-15 | Roechling Leripa Papertech Gmbh & Co Kg | Saugwalze |
CN115343255A (zh) * | 2022-09-05 | 2022-11-15 | 合肥工业大学 | 一种红外水分测量装置 |
CN117928199A (zh) * | 2024-03-21 | 2024-04-26 | 兴化市丝康丝绸有限公司 | 一种纺织品生产加工的纺织面料烘干装置 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911394A1 (de) | 1999-03-15 | 2000-09-21 | Voith Sulzer Papiertech Patent | Verfahren zum Betreiben einer Maschine zur Herstellung und/oder Veredelung von Materialbahnen |
DE19911395A1 (de) | 1999-03-15 | 2000-09-21 | Voith Sulzer Papiertech Patent | Vorrichtung zum Bestimmen von Eigenschaften einer laufenden Materialbahn und/oder einer Maschine zu deren Herstellung und/oder Veredelung |
DE50110918D1 (de) * | 2000-05-24 | 2006-10-19 | Voith Patent Gmbh | Trockenpartie |
US6749723B2 (en) * | 2000-06-28 | 2004-06-15 | Metso Paper Karlstad Ab | Measuring arrangements in a shortened dry end of a tissue machine |
DE10305598A1 (de) * | 2003-02-11 | 2004-08-19 | Voith Paper Patent Gmbh | Messverfahren und Messeinrichtung zur Bestimmung des Feuchtigkeitsgehaltes einer Materialbahn |
DE10312836A1 (de) * | 2003-03-21 | 2004-10-14 | Voith Paper Patent Gmbh | Vorrichtung zur Herstellung einer Faserstoffbahn |
US6950777B1 (en) | 2003-07-29 | 2005-09-27 | Voith Paper Inc. | Method and system for assessing pulp and paper mill performance |
DE102004053734B4 (de) * | 2004-11-06 | 2007-01-18 | Sartorius Ag | Trocknungswaage |
US7938935B2 (en) * | 2007-10-11 | 2011-05-10 | Honeywell Asca Inc. | Infrared measurement of paper machine clothing condition |
US8148690B2 (en) * | 2009-09-24 | 2012-04-03 | ABB, Ltd. | Method and apparatus for on-line web property measurement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4325915A1 (de) | 1993-08-02 | 1995-02-09 | Fleissner Maschf Gmbh Co | Verfahren zum Messen einer Feuchte einer Warenbahn an einem Durchströmungstrockner und Vorrichtung zur Durchführung des Verfahrens |
Family Cites Families (13)
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US3040807A (en) * | 1959-11-04 | 1962-06-26 | Industrial Nucleonics Corp | Moisture balance correction system |
AT307106B (de) * | 1970-08-18 | 1973-05-10 | Oesterr Studien Atomenergie | Verfahren und Vorrichtung zur Bestimmung der Konzentration eines Probenelementes |
US3791049A (en) * | 1971-10-04 | 1974-02-12 | Smitherm Industries | Drying methods with moisture profile control |
IT982680B (it) * | 1972-04-10 | 1974-10-21 | Infra Systems Inc | Sistema di misura mediante radia zione infrarossa |
FR2254436B1 (de) * | 1973-12-13 | 1979-01-26 | Holweg Const Mec | |
DE2655972C3 (de) * | 1976-12-10 | 1980-03-06 | Hoechst Ag, 6000 Frankfurt | Verfahren zur gleichmäßigen Vortrocknung von textlien Warenbahnen |
GB8325691D0 (en) * | 1983-09-26 | 1983-10-26 | Wiggins Teape Group Ltd | Measuring water content |
FI81627C (fi) * | 1988-02-02 | 1990-11-12 | Valmet Paper Machinery Inc | Foerfarande vid reglering, styrning och/ eller kontroll av torkningen av en belagd bana. |
FR2667940B1 (fr) * | 1990-10-11 | 1992-12-18 | Centre Tech Ind Papier | Procede pour mesurer en continu la retention d'eau dynamique d'une enduction sur un support en defilement et notamment sur une feuille de papier. |
DE4108056A1 (de) * | 1991-03-13 | 1992-09-17 | Feldmuehle Ag Stora | Verfahren zur behebung von planlagestoerungen bei der herstellung von bahnen in papier- oder kartonmaschinen und vorrichtung zu seiner durchfuehrung |
US5539634A (en) * | 1993-09-03 | 1996-07-23 | Measurex Corporation | Sheetmaking system identification using synthetic measurement produced from redundant noisy measurements |
US5563809A (en) * | 1994-04-06 | 1996-10-08 | Abb Industrial Systems, Inc. | Measurement/control of sheet material using at least one sensor array |
DE19741519A1 (de) * | 1997-09-20 | 1999-03-25 | Voith Sulzer Papiermasch Gmbh | Meßverfahren zur Bestimmung des Feuchtigkeitsgehaltes einer Faserstoffbahn |
-
1998
- 1998-09-30 DE DE19844927A patent/DE19844927A1/de not_active Withdrawn
-
1999
- 1999-07-17 DE DE59912646T patent/DE59912646D1/de not_active Expired - Lifetime
- 1999-07-17 EP EP99113968A patent/EP0990865B1/de not_active Expired - Lifetime
- 1999-09-29 US US09/407,987 patent/US6254726B1/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4325915A1 (de) | 1993-08-02 | 1995-02-09 | Fleissner Maschf Gmbh Co | Verfahren zum Messen einer Feuchte einer Warenbahn an einem Durchströmungstrockner und Vorrichtung zur Durchführung des Verfahrens |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT522782B1 (de) * | 2019-12-19 | 2021-02-15 | Roechling Leripa Papertech Gmbh & Co Kg | Saugwalze |
AT522782A4 (de) * | 2019-12-19 | 2021-02-15 | Roechling Leripa Papertech Gmbh & Co Kg | Saugwalze |
EP3839137A1 (de) | 2019-12-19 | 2021-06-23 | Röchling Industrial Oepping GmbH & Co. KG | Saugwalze |
US11441270B2 (en) | 2019-12-19 | 2022-09-13 | Röchling Industrial Oepping GmbH & Co. KG | Suction roll |
CN115343255A (zh) * | 2022-09-05 | 2022-11-15 | 合肥工业大学 | 一种红外水分测量装置 |
CN115343255B (zh) * | 2022-09-05 | 2024-08-23 | 合肥工业大学 | 一种红外水分测量装置 |
CN117928199A (zh) * | 2024-03-21 | 2024-04-26 | 兴化市丝康丝绸有限公司 | 一种纺织品生产加工的纺织面料烘干装置 |
CN117928199B (zh) * | 2024-03-21 | 2024-06-11 | 兴化市丝康丝绸有限公司 | 一种纺织品生产加工的纺织面料烘干装置 |
Also Published As
Publication number | Publication date |
---|---|
EP0990865A3 (de) | 2001-12-05 |
DE19844927A1 (de) | 2000-04-06 |
DE59912646D1 (de) | 2006-02-23 |
EP0990865B1 (de) | 2005-10-12 |
US6254726B1 (en) | 2001-07-03 |
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