EP0819488B1 - Fermeture à tiroir pour un récipient contenant un bain métallique en fusion - Google Patents

Fermeture à tiroir pour un récipient contenant un bain métallique en fusion Download PDF

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Publication number
EP0819488B1
EP0819488B1 EP97111680A EP97111680A EP0819488B1 EP 0819488 B1 EP0819488 B1 EP 0819488B1 EP 97111680 A EP97111680 A EP 97111680A EP 97111680 A EP97111680 A EP 97111680A EP 0819488 B1 EP0819488 B1 EP 0819488B1
Authority
EP
European Patent Office
Prior art keywords
housing frame
vessel
sliding
manipulator
gate valve
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
Application number
EP97111680A
Other languages
German (de)
English (en)
Other versions
EP0819488A2 (fr
EP0819488A3 (fr
Inventor
Werner Plattner
Walter Toaldo
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.)
Stopinc AG
Original Assignee
Stopinc AG
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 Stopinc AG filed Critical Stopinc AG
Publication of EP0819488A2 publication Critical patent/EP0819488A2/fr
Publication of EP0819488A3 publication Critical patent/EP0819488A3/fr
Application granted granted Critical
Publication of EP0819488B1 publication Critical patent/EP0819488B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/24—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings characterised by a rectilinearly movable plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/38—Means for operating the sliding gate

Definitions

  • the invention relates to a sliding closure for a metal melt containing Container with a housing frame which can be attached to a spout of the container, in which a refractory base plate and one on the latter by means of spring elements sealingly compressible refractory arranged in a slide unit Slider plate is included, the slider unit by means of a drive member can be moved back and forth.
  • a known sliding closure according to DE-C2 25 23 928 which contains itself as a molten metal especially for a converter Suitable container, has a slide lock assembly that with known refractory wear parts, namely a slide, one Base plate and an outlet sleeve, is pre-assembled. This pre-assembled The unit is attached to an am using eyebolts and guide bolts Tapping the converter attached frame attached.
  • the object of the present invention is to provide a To create a sliding closure according to the type described at the outset, which is essentially simple in an automated operation and can be removed from the container or mounted on it can, and in which the tightness between the plates on the one hand or between the bottom plate and the head part adjoining this, on the other hand is fully guaranteed.
  • the object is characterized by the characterizing part of claim 1 solved.
  • FIG. 1 shows a slide closure 20, which is on the spout 12 of a molten metal containing container 10 is arranged.
  • container 10 is a converter, in which the spout 12 is not on the bottom as usual, but is arranged in the upper region of the side wall of the container. When emptying, it is tilted and the one previously treated in it Molten metal flows through the pouring spout 12 in a pan or the like.
  • From the container provided as a converter 10 is only an outside metal outlet 14, in which in a partial representation a refractory inlet sleeve 11, a this enclosing refractory sleeve 16 and a mortar bed 15 are arranged is.
  • This container 10 is otherwise similar to the one which is shown in the aforementioned document DE-PS 25 23 928.
  • An adapter plate 40 can be detached on the end face of the outlet connection 14 fixed, to which in turn the slide lock 20 is attached.
  • This sliding closure 20 has a housing frame 22 in which one stationary refractory base plate 25 with a lower sliding surface 28, a slide plate 26 which can be pressed against the latter and one of these holding slide unit 23 is provided. The latter will pass one to this couplable push rod 29 moved back and forth by a drive element, whereby the slide lock 10 in the open position - as shown - or is displaceable in the closed position.
  • To the slide plate 26 also connects to a refractory pouring sleeve 32 through which the flowing metal melt is passed into the pan or the like. It should also be noted here that the slide closure in the case of converter racking only either the opening or the closing position takes place and therefore no regular pouring of the outflow takes place.
  • the bottom plate 25 has on the top one to its lower sliding surface 28 parallel sliding plane 27 and it is in the direction of this sliding surface 28 stationary, but vertically adjustable in the frame 22 arranged. This enables it to be attached to a container spout 12 Refractory head part 42 can be pressed and forms together with the latter a tight separation point.
  • the base plate 25 is from a cassette 25 'edged, which in the housing frame 22 transversely to the longitudinal extent the plates are adjustable. This arrangement enables this Take away or assemble the housing frame 22 together with the plates 26, 28 and the slide unit 23 from or to the container 10.
  • the housing frame 22 including the slide 26 and the bottom plate 25 below the spout 12 across to the spout extending, attached to the container 10 guide rails 52 longitudinally held. After moving by a defined stroke this housing frame is detached from the container 10. Furthermore, the Housing frame 22 at least one connecting means for releasable coupling with a manipulator, by means of which it is on the guide rails 52 moved and removed from the front of the container 10 or on this can be assembled.
  • the connecting means on the housing frame 22 is formed as a coupling pin 62 3us, which with a on the extension arm of a manipulator attached sleeve in the sense of a bayonet lock can be coupled, which in the coupled state is a rigid connection form.
  • the disk-shaped refractory head part 42 is at the bottom with a flat end face 43, meanwhile on the top with an end face Circular groove 44 provided in which there is an annular extension of the pouring sleeve 11 extends and in between advantageously a hardening mortar is inserted.
  • This head part 42 is covered with a flange 42 ', which in an annular recess 41 in the adapter plate 40 of Fastening means 45 is fixed from below. If something is taken away Sliding lock 20, this head part 42 can also be released and replaced become.
  • the lower flat end surface is 43 of the head part 42 to that of the adapter plate 40 and allowed in that they are with the sliding plane 27 on the top of the bottom plate 25, which also extends beyond the slide frame 22, in contact stands.
  • the refractory base plate 25 as well as the slide plate 26 and the Spout sleeve 32 are otherwise in the conventional manner with one high quality fireproof, e.g. insert made of zircon, which each in a refractory base material and in the latter comprehensive metal bandage is embedded.
  • an actuatable coupling device 30 attached on the adapter plate 40 .
  • This coupling device expediently has 30 a flange part 33 fastened to the adapter plate 40 and one in the latter Swivel-mounted coupling sleeve 34, in which an opening 35 is provided for receiving the push rod 29.
  • On the inside the coupling sleeve 34 a plurality of cams 36 are formed, which in the assembled Condition with one connected to the housing frame 22 Flange 22 'are engaged and for releasably fixing the housing frame serve as a container.
  • Fig.2 and Fig.3 has the container 10 by means of screws or The like attached adapter plate 40 two arranged parallel to each other L-shaped guide rails 52, each with an inner guide track 53, on each of the two long sides of the housing frame 22 a protruding support arm 55 rests.
  • these two support arms 55 are each contain a plurality of spring assemblies 56 arranged side by side.
  • the latter are each a plurality of disc springs 56 and one on the guideway 53 associated guide pin 56 'assigned.
  • the disc springs 56 generate an axial pressure force on a respective guide pin 56 '.
  • the housing frame 22 can by means of a manipulator explained below 80, which can be connected to the coupling pin 62, in Longitudinal direction of the guide rails 52 are removed from the container.
  • the coupling sleeve 34 must initially by means of a manually operated lever 34 'are rotated by 90 ° so that the Push rod 29 is released from the slide unit 23.
  • the Housing frame 22 are shifted to the left along the image plane and once its support arms 55 disengage from the guide rails 52 stand, it can be removed from the container and turned into one of the hot one Converter can be brought to remote assembly site. There you can then the refractory plates in it are replaced.
  • spring packs 56 of the same dimensions are provided. These are gradual staggered, such that the guide pin 56 'of Spring packs 56 form a line with their lower contact surfaces parallel to the bearing surface 53 "of the guideway 53, which oblique or wedge-shaped to the direction of displacement of the housing frame in is arranged at an angle of approximately 1 to 2 degrees.
  • the spring assemblies due to the oblique arrangement of the contact surfaces 56 only shortly before the end position of the inserted housing frame shown 22, i.e. roughly the distance between two spring assemblies.
  • the guideway 53 is also on the entrance side with an additional ramp-shaped bevel 53 'provided that the housing frame is inserted correctly 22 allows in these guide rails.
  • the push rod 29 also has one at the front end lateral flattened ball 29 ', which in a corresponding Recess of a connecting part 23 'mounted in the flange 22' is inserted and after rotation of the push rod is coupled with it.
  • the Coupling sleeve 34 and with it the push rod 29 rotated by 90 °, whereby the push rod 29 provided with lateral flats a connecting part 23 'of the slide unit mounted in the flange 22' 23 connects.
  • the slide unit 23 can then by the drive member which is preferably a hydraulic drive, in the desired Positions are shifted.
  • the lever 34 'becomes advantageous by means of a locking cam 38 indicated in FIG. 2 against rotation secured.
  • the housing frame 22 is removed when the Push rod 29 released in reverse order.
  • FIG. 6 shows a schematic representation of the structure of the manipulator 80, one placed on a forklift 87 or the like shown in Figs Socket 86 adjustable in the direction of the arrow, one arranged thereon Control cabin 85 and an actuating cylinder 84.
  • the Sokkel 86 has height-adjustable support legs 89 that are on a stage 90 or the like. Furthermore, the position of the on the base 86 Manipulator 80 articulated to the container 10 defining gripper 88, the the centering pin 83 can be positioned, each on both sides of the on the container 10 attached adapter plate 40 are provided. With this positioning manipulator 80 sets the spatial position of container 10 firmly.
  • the actuating cylinder 84 of the manipulator 80 can also its coupling sleeve 82 attached to the tip of the piston rod 81 via the coupling bolt 62 of the slide lock housing frame 22 be pushed and coupled to it by twisting.
  • the on Converter attached housing frame 22 can then in from the clutch 30 released position by axial adjustment of the piston rod 81 removed and taken to an assembly site.
  • the actuating cylinder 84 is for this purpose by means of a cylinder unit 91 in a pivot bearing 92 on the cabin 85 pivotable about a horizontal Axis held. After removing the slide lock by means of this He becomes manipulator by the forklift, of which the fork 87 is indicated, advantageously placed in a place protected from heat and dirt.
  • this slide lock according to the invention, in principle, also for regulating the discharge Electric oven, for a pan or used in continuous casting plants suitable for a distribution vessel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Sliding Valves (AREA)
  • Closures For Containers (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (13)

  1. Fermeture à tiroir pour un récipient contenant un bain de métal en fusion, comprenant un cadre (22) qui peut être monté sur un orifice de coulée (12) du récipient et dans lequel sont contenues une plaque de fond (25) réfractaire et une plaque-tiroir (26) réfractaire disposée dans une unité de tiroir (23) et pouvant être appliquée à l'aide d'éléments de ressort (56) de façon étanche contre ladite plaque de fond, l'unité de tiroir (23) étant déplaçable en va-et-vient à l'aide d'un organe d'entraínement, caractérisée par le fait
    que le cadre (22), y compris la plaque-tiroir (26) et la plaque de fond (25), est maintenu en dessous de l'orifice de coulée (12) de façon déplaçable en translation longitudinale sur des rails de guidage fixés au récipient (10) et s'étendant transversalement à l'orifice de coulée, rails sur lesquels les éléments de ressort (56) prennent appui, les rails de guidage étant réalisés de manière que le cadre (22), après déplacement en translation sur une course définie, peut être séparé du récipient (10), et
    que le cadre (22) présente au moins un moyen d'assemblage (62) pour l'accouplement séparable avec un manipulateur (80), ce manipulateur (80) étant destiné à déplacer ledit cadre (22) en translation sur les rails de guidage (52) et à le retirer du récipient (10) et le monter sur ce dernier.
  2. Fermeture à tiroir suivant la revendication 1, caractérisée par le fait que le moyen d'assemblage sur le cadre (22) est réalisé sous la forme d'un doigt d'accouplement (62) qui peut être accouplé, à la manière d'un système à baïonnette, avec un manchon d'accouplement (82) disposé sur le vérin d'actionnement (84) du manipulateur (80) pour établir, à l'état accouplé, un assemblage rigide.
  3. Fermeture à tiroir suivant la revendication 1 ou 2, caractérisée par le fait qu'il comprend deux rails de guidage (52) en L, disposés parallèlement l'un à l'autre, formant chacun une piste de guidage (53) intérieure présentant une partie abaissée (53') à une extrémité, piste sur laquelle le cadre (22) est guidé longitudinalement à l'aide d'un bras de support (55) sur chacun des deux côtés.
  4. Fermeture à tiroir suivant l'une des revendications 1 à 3, caractérisée par le fait que le cadre (22), lors du montage sur le récipient (10), peut être soulevé par le manipulateur (80) entre les rails de guidage (52), être déplacé en translation sur ces derniers jusqu'à la position de coulée et que pendant la translation a lieu le serrage entre la plaque-tiroir (26), la plaque de fond (25) et une partie de tête (42) réfractaire, fixée à l'orifice de coulée du récipient (10).
  5. Fermeture à tiroir suivant l'une des revendications précédentes, caractérisée par le fait que sur le récipient (10) est prévu un dispositif d'accouplement (30) actionnable qui est destiné à fixer le cadre (22), après translation à la position de coulée, par rapport au récipient et, simultanément, à relier l'unité de tiroir (23) à une tige de poussée (29) associée à l'organe d'entraínement fixé au récipient (10).
  6. Fermeture à tiroir suivant la revendication 5, caractérisée par le fait que le dispositif d'accouplement (30) comprend une partie bride (33) fixée à la plaque d'adaptateur (40) et une douille d'accouplement (34) montée pivotante dans cette partie bride et comportant des cames intérieures (36) pour l'assemblage libérable avec une bride (22') du cadre (22) ainsi qu'une liaison d'entraínement avec la tige de poussée (29) pour la rotation de cette dernière.
  7. Fermeture à tiroir suivant l'une des revendications précédentes, caractérisée par le fait que sur le récipient (10) sont prévus des moyens de positionnement sur lesquels un bras de préhension du manipulateur peut être centré en vue de la détermination de la position momentanée du récipient.
  8. Fermeture à tiroir suivant l'une des revendications précédentes, caractérisée par le fait que les paquets de ressorts (56) sont disposés dans le bras de support respectif (50) et la piste de guidage (53) entrant en contact avec lesdits paquets est disposée de telle manière que le serrage du cadre (22), lors de l'engagement dans les rails de guidage (52), n'ait lieu que peu de temps avant que la position finale soit atteinte.
  9. Fermeture à tiroir suivant la revendication 8, caractérisée par le fait que les axes de guidage (56') des paquets de ressorts (56) forment, au niveau de leurs surfaces d'appui inférieures, une ligne s'étendant parallèlement à la surface d'appui (53") de la piste de guidage (53), laquelle est disposée de façon oblique ou en coin par rapport à la direction de translation du cadre (22).
  10. Cadre pour une fermeture à tiroir suivant l'une des revendications précédentes, caractérisé par le fait que le cadre (22) sert à recevoir la plaque-tiroir (26) et la plaque de fond (25), présente au moins un moyen d'assemblage pour l'accouplement libérable avec un manipulateur (40) et comporte sur chacun de ses deux côtés longitudinaux un bras de support (55) pour le maintien sur le récipient (10).
  11. Plaque d'adaptateur pour une fermeture à tiroir suivant l'une des revendications 1 à 9, caractérisée par le fait que la plaque d'adaptateur (40) présente les rails de guidage (52) disposés parallèlement l'un à l'autre pour le maintien du cadre (22) et une ouverture pour recevoir une partie de tête (42) réfractaire.
  12. Plaque d'adaptateur suivant la revendication 11, caractérisée par le fait que la plaque d'adaptateur (40) est munie de moyens de positionnement (83) pour le manipulateur.
  13. Manipulateur pour une fermeture à tiroir suivant l'une des revendications 1 à 9, caractérisé par le fait que le manipulateur (80) comprend un dispositif de préhension (88) pour déterminer la position dans l'espace du récipient (10) et un vérin d'actionnement (84) avec un moyen d'assemblage (82) à l'aide duquel le manipulateur peut saisir le cadre (22) à l'endroit du moyen d'assemblage (62) de ce dernier et le retirer du récipient (10).
EP97111680A 1996-07-18 1997-07-10 Fermeture à tiroir pour un récipient contenant un bain métallique en fusion Expired - Lifetime EP0819488B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH180896 1996-07-18
CH180896 1996-07-18
CH1808/96 1996-07-18

Publications (3)

Publication Number Publication Date
EP0819488A2 EP0819488A2 (fr) 1998-01-21
EP0819488A3 EP0819488A3 (fr) 1998-03-11
EP0819488B1 true EP0819488B1 (fr) 2000-02-09

Family

ID=4219093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111680A Expired - Lifetime EP0819488B1 (fr) 1996-07-18 1997-07-10 Fermeture à tiroir pour un récipient contenant un bain métallique en fusion

Country Status (11)

Country Link
US (1) US5836485A (fr)
EP (1) EP0819488B1 (fr)
JP (1) JPH1060516A (fr)
KR (1) KR100520243B1 (fr)
CN (1) CN1063693C (fr)
AT (1) ATE189635T1 (fr)
CA (1) CA2210778C (fr)
DE (1) DE59701105D1 (fr)
ES (1) ES2146441T3 (fr)
TW (1) TW360569B (fr)
ZA (1) ZA975908B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009127420A1 (fr) * 2008-04-17 2009-10-22 Stopinc Aktiengesellschaft Plaque d'obturation ainsi qu'obturateur à tiroir à l'ouverture de coulée d'un récipient pour bain métallique
WO2009127333A1 (fr) * 2008-04-17 2009-10-22 Stopinc Aktiengesellschaft Obturateur à tiroir pour récipient contenant un bain métallique
WO2011047799A2 (fr) 2009-10-21 2011-04-28 Stopinc Aktiengesellschaft Unité réfractaire destinée à un obturateur à tiroir situé sur la busette de coulée d'un contenant pour métal en fusion

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
CA2242501C (fr) * 1997-07-16 2009-06-16 Werner Keller Robinet-vanne a lunette pour un recipient contenant du metal en fusion
MXPA01000931A (es) * 1998-07-26 2002-04-24 Stopinc Ag Valvula de compuerta deslizante para un contenedor que contiene metal fundido.
EP1707291A1 (fr) * 2005-03-10 2006-10-04 Tech-Gate S.A. Oberateur â tiroir
EP1894649A1 (fr) * 2006-09-01 2008-03-05 Stopinc Aktiengesellschaft Dispositif de maintenance d'un obturateur coulissant monté au trou d'un récipient contenant du métal liquide
US8783528B1 (en) 2010-08-27 2014-07-22 J.W. Hicks, Inc. Slide gate for casting operations
CN102776316A (zh) * 2012-06-08 2012-11-14 上海雨山冶金新材料有限公司 用于转炉出钢口挡渣出钢装置的滑板砖
CN106086297B (zh) * 2016-08-24 2018-02-13 河南熔金高温材料股份有限公司 一种转炉挡渣滑动水口装置
KR20210132667A (ko) 2019-02-28 2021-11-04 베수비우스 그룹, 에스. 에이. 캐리지를 포함하는 슬라이딩 게이트 밸브
CN109834252A (zh) * 2019-04-01 2019-06-04 山东钢铁集团日照有限公司 一种提高钢包上水口使用寿命的方法
KR102203407B1 (ko) 2019-05-23 2021-01-15 국방과학연구소 병진운동형 밸브 및 이의 개폐 방법

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Publication number Priority date Publication date Assignee Title
US3352465A (en) * 1965-05-06 1967-11-14 United States Steel Corp Refractory closure member for bottom pour vessels
US3786969A (en) * 1972-04-17 1974-01-22 Steel Corp Sliding-gate closure construction for bottom-pour vessels
BE810331A (fr) * 1974-01-29 1974-05-16 Bidon a mazout pour le remplissage du reservoir d'un poele a mazout.
US4077552A (en) * 1977-01-27 1978-03-07 United States Steel Corporation Sliding gate spring loading toggle
EP0621098B2 (fr) * 1993-04-19 2005-11-23 Vesuvius France S.A. Dispositif de coulée comportant une liaison sans ciment d'un conteneur métallurgique à un obturateur à tiroir et procédé de mise en oeuvre de ce dispositif
CH689447A5 (de) * 1994-12-16 1999-04-30 Concast Standard Ag Einrichtung zum Zufuehren einer Stahlschmelze in eine Stranggiesskokille.
JPH08271163A (ja) * 1995-02-17 1996-10-18 Stopinc Ag 金属溶融物を含む容器のための摺動蓋

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009127420A1 (fr) * 2008-04-17 2009-10-22 Stopinc Aktiengesellschaft Plaque d'obturation ainsi qu'obturateur à tiroir à l'ouverture de coulée d'un récipient pour bain métallique
WO2009127333A1 (fr) * 2008-04-17 2009-10-22 Stopinc Aktiengesellschaft Obturateur à tiroir pour récipient contenant un bain métallique
CN102006952B (zh) * 2008-04-17 2016-03-23 斯托品克股份公司 闭锁板以及在用于金属熔体的容器的出口处的滑动闭锁器
WO2011047799A2 (fr) 2009-10-21 2011-04-28 Stopinc Aktiengesellschaft Unité réfractaire destinée à un obturateur à tiroir situé sur la busette de coulée d'un contenant pour métal en fusion
WO2011047799A3 (fr) * 2009-10-21 2011-06-16 Stopinc Aktiengesellschaft Unité réfractaire destinée à un obturateur à tiroir situé sur la busette de coulée d'un contenant pour métal en fusion
US9027802B2 (en) 2009-10-21 2015-05-12 Stopinc Aktiengesellschaft Fireproof unit for a sliding closure at the spout of a container for metal melt

Also Published As

Publication number Publication date
CA2210778A1 (fr) 1998-01-18
ZA975908B (en) 1998-03-30
US5836485A (en) 1998-11-17
KR100520243B1 (ko) 2006-01-12
EP0819488A2 (fr) 1998-01-21
ES2146441T3 (es) 2000-08-01
CA2210778C (fr) 2005-10-11
JPH1060516A (ja) 1998-03-03
EP0819488A3 (fr) 1998-03-11
DE59701105D1 (de) 2000-03-16
CN1063693C (zh) 2001-03-28
TW360569B (en) 1999-06-11
ATE189635T1 (de) 2000-02-15
CN1176860A (zh) 1998-03-25
KR980008397A (ko) 1998-04-30

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