NO894100L - DRILLING TOOL FOR THE MANUFACTURE OF UNDERGROUND DRILL. - Google Patents
DRILLING TOOL FOR THE MANUFACTURE OF UNDERGROUND DRILL.Info
- Publication number
- NO894100L NO894100L NO89894100A NO894100A NO894100L NO 894100 L NO894100 L NO 894100L NO 89894100 A NO89894100 A NO 89894100A NO 894100 A NO894100 A NO 894100A NO 894100 L NO894100 L NO 894100L
- Authority
- NO
- Norway
- Prior art keywords
- drill
- drilling tool
- suction
- socket
- area
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title description 3
- 235000013312 flour Nutrition 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims 1
- 230000032258 transport Effects 0.000 description 3
- 241000272517 Anseriformes Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
- B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
- B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
- B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0018—Drills for enlarging a hole
- B23B51/0027—Drills for enlarging a hole by tool swivelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/0046—Devices for removing chips by sucking
Description
Oppfinnelsen angår et boreverktøy til fremstilling av borhull med underskjæring som angitt i innledningen til krav 1. The invention relates to a drilling tool for the production of boreholes with undercutting as stated in the introduction to claim 1.
Fra DE-A-33 40 090 er der kjent et boreverktøy av den inn-ledningsvis nevnte art, hvor et bor kan skrues inn i et bormottak. I området for bormottaket er der anordnet en avsugningsklokke som omslutter bormottaket og borskaftet. Avsugningsklokken blir ved hjelp av en sugeslange tilkoblet en avsugningsvifte på en bormaskin eller lignende.Avsugnings-innretningen har til formål å suge bort det bormel som dannes i borhullet under boreoperasjonen. Ved dette kjente verktøy er borskaftet ført med sideveis klaring i en avsugningshylse, slik at boret kan svinges inne i denne. Som følge av svingebevegelsen kan der i bunnen av borhullet fremstilles en utvidelse av dette, dvs. en underskjæring. From DE-A-33 40 090 there is known a drilling tool of the type mentioned in the introduction, where a drill can be screwed into a drill socket. In the area of the drill reception there is a suction bell which encloses the drill reception and the drill shaft. The suction bell is connected by means of a suction hose to a suction fan on a drilling machine or similar. The purpose of the suction device is to suck away the drilling dust that forms in the drill hole during the drilling operation. With this known tool, the drill shank is guided with lateral clearance in a suction sleeve, so that the drill can be swung inside this. As a result of the swinging movement, an extension of this, i.e. an undercut, can be produced at the bottom of the drill hole.
I et borhull med underskjæring kan man sette inn ekspansjons-plugger av metall som kan ekspanderes i området for under-skj æringen og dermed kan forankres med formsluttende inngrep i borhullet. In a borehole with an undercut, expansion plugs made of metal can be inserted which can expand in the area of the undercut and can thus be anchored with form-locking engagements in the borehole.
For fremstilling av en mest mulig nøyaktig underskjæring i bunnen av borhullet må svingebevegelsen av boret begrenses. Dette kan oppnås ved at boret omtrent på midten av borskaftet har en utvidelse av tverrsnittet som tjener som svingelager som støtter seg mot borhullveggen. Som følge av tverrsnittsøkningen vanskeliggjøres imidlertid en avsugning av bormelet, da det i området for tverrsnittsøkningen eventuelt bare blir tilbake en liten spalte for avsugning. To produce the most accurate undercut at the bottom of the drill hole, the swinging movement of the drill must be limited. This can be achieved by the drill approximately in the middle of the drill shank having an extension of the cross-section which serves as a pivot bearing that rests against the borehole wall. As a result of the increased cross-section, however, suction of the drill flour is made more difficult, as in the area of the increased cross-section, only a small gap remains for suction.
Til grunn for oppfinnelsen ligger den oppgave å skaffe et boreverktøy til fremstilling av borhull med underskjæring, hvor boreverktøyet har en avsugningsinnretning som er av enkel konstruksjon og tillater en avsugning ved borspissen. Løsningen av denne oppgave fås som følge av de trekk som er angitt i krav 1. Den aksiale, gjennomgående boring tillater en avsugning direkte ved borspissen, mens de i området for tverrsnittsutvidelsen av boret anordnede spor tillater en etterstrømning av den bortførte luftmengde. Sporene har dessuten den fordel at borskaftet ikke kan klemme seg fast i borhullet. Ved en utførelse med glatt borskaft og en borskaftutvidelse med omtrent den samme diameter som borhodet, opptrer der ofte en fastklemming av boret, noe som er påvist ved forsøksboringer. The invention is based on the task of providing a drilling tool for the production of boreholes with undercutting, where the drilling tool has a suction device which is of simple construction and allows suction at the drill tip. The solution to this problem is obtained as a result of the features stated in claim 1. The axial, continuous drilling allows a suction directly at the drill tip, while the grooves arranged in the area of the cross-sectional expansion of the drill allow a backflow of the removed air quantity. The grooves also have the advantage that the drill shank cannot get stuck in the drill hole. In the case of a design with a smooth drill shank and a drill shank extension with approximately the same diameter as the drill head, a jamming of the drill often occurs, which has been proven during test drilling.
Boret er fortrinnsvis ved hjelp av et gjengeparti skrudd inn i bormottaket, som danner et avsugningsrom og er omgitt av en rørformet avsugningsklokke. Fortrinnsvis består avsugningsklokken av et rørparti som oppviser en sideveis utragende avsugningsstuss som en sugeslange til en sugepumpe kan tilkobles på kjent måte. Rørpartiet av avsugningsklokken er herunder på enkel måte fastholdt mellom to flenser, hvorav den ene er utformet på bormottaket og den andre på borskaftet. Den på borskaftet utformede flens tjener samtidig som dybdeanslag som fastlegger den maksimale borhulldybde. The drill is preferably screwed into the drill socket by means of a threaded part, which forms a suction chamber and is surrounded by a tubular suction bell. Preferably, the suction bell consists of a pipe section which exhibits a laterally projecting suction nozzle to which a suction hose to a suction pump can be connected in a known manner. The tube part of the suction bell is here simply held between two flanges, one of which is designed on the drill socket and the other on the drill shank. The flange designed on the drill shank also serves as a depth stop that determines the maximum drill hole depth.
De i borskaftet tildannede, ca. 1-2 cm lange spor har fortrinnsvis en slik stigning at de transporterer det bormel som oppstår i dette område, i retning mot borhodet. Stigningen av sporene kan imidlertid også for noen eller alle spors ved-kommende være motsatt slik som for bormelspor, såfremt dette er ønskelig for spesielle anvendelser. Sporene tjener både som tilførselskanaler for luft og til videretransport av det bormel som oppstår i dette område. Those formed in the drill shaft, approx. 1-2 cm long tracks preferably have such a rise that they transport the drill flour that occurs in this area, in the direction of the drill head. However, the rise of the tracks can also be the opposite for some or all of the tracks as for boring tracks, if this is desirable for special applications. The tracks serve both as supply channels for air and for further transport of the flour that occurs in this area.
For at borplaten skal kunne lagres optimalt i borhodet, er det fordelaktig å føre den gjennomgående boring forbi borplaten til side for og med avstand fra borplaten. Borplaten kan dermed settes inn i et spor som er tildannet i et massivt parti av borhodet. In order for the drill plate to be stored optimally in the drill head, it is advantageous to lead the through hole past the drill plate to the side of and at a distance from the drill plate. The drill plate can thus be inserted into a groove formed in a solid part of the drill head.
Særlig fordelaktig er det om den gjennomgående boring i området for borhodet er forgrenet, slik at der på begge sider av borplaten strekker seg en kanal til en avsugningsåpning. Man kan tale om at den gjennomgående boring er gaffelformet. De to avsugningsåpninger som fås på denne måte, tillater at det bormel som oppstår på begge sider av borplaten, kan suges ut It is particularly advantageous if the continuous drilling in the area of the drill head is branched, so that on both sides of the drill plate a channel extends to a suction opening. One can say that the through bore is fork-shaped. The two suction openings obtained in this way allow the drill flour that occurs on both sides of the drill plate to be sucked out
direkte.direct.
Oppfinnelsen vil i det etterfølgende bli nærmere beskrevet under henvisning til tegningen. Fig. 1 viser et av tre deler bestående boreverktøy ifølge oppfinnelsen. The invention will subsequently be described in more detail with reference to the drawing. Fig. 1 shows a three-part drilling tool according to the invention.
Fig. 2 er et snitt gjennom bormottaket i boreverktøyet påFig. 2 is a section through the drill socket in the drilling tool on
fig. 1.fig. 1.
Fig. 3 viser forenden av boret med en forgrenet eller gaffelformet gjennomgående boring, sett fra siden og fra enden. Fig. 3 shows the front end of the drill with a branched or fork-shaped through bore, seen from the side and from the end.
Det på fig. 1 viste boreverktøy består av et bormottak 1, et bor 2 og en avsugningsklokke 3. Bormottaket 1 har et festeskaft 4, ved hvis hjelp bormottaket kan spennes fast i en kjoks eller lignende i en bormaskin. Videre har bormottaket 1 et avsugningsrom 5 som avsugningsklokken 3 kan skyves inn på nedenfra. En åpning 6 forbinder avsugningsrommet 5 med det indre 7 av avsugningsklokken 3. That in fig. The drilling tool shown in 1 consists of a drill socket 1, a drill bit 2 and a suction bell 3. The drill socket 1 has a fastening shaft 4, with the help of which the drill socket can be clamped in a chuck or similar in a drilling machine. Furthermore, the drill receiver 1 has a suction chamber 5 into which the suction bell 3 can be pushed from below. An opening 6 connects the suction chamber 5 with the interior 7 of the suction bell 3.
Med den nedre ende av bormottaket 1 er der i en boring 8 som danner avsugningsrommet, tildannet innvendige gjenger 9. På fig. 2 er boringen 8 nærmere vist. With the lower end of the drill socket 1, internal threads 9 are formed in a bore 8 which forms the suction space. In fig. 2, the bore 8 is shown in more detail.
Boret 2 har et gjengeparti 10 som kan skrues inn i de innvendige gjenger 9. Før dette gjøres, blir imidlertid avsugningsklokken 3 skjøvet inn over avsugningsrommet 5. En på bormottaket 1 utformet flens 11 og en på boret 2 tildannet flens 12 lukker avsugningsklokken 3 ved dennes ender. The drill 2 has a threaded part 10 which can be screwed into the internal threads 9. However, before this is done, the suction bell 3 is pushed in over the suction chamber 5. A flange 11 formed on the drill socket 1 and a flange 12 formed on the drill 2 close the suction bell 3 at its ducks.
Boret 2 har et glatt skaft 13 som er forsynt med spor 14 som er fordelt rundt omkretsen. Sporene 14 befinner seg i området for det største skafttverrsnitt og tjener som ytre luftkanaler og som friksjonselementer som hindrer at boret klemmer seg fast i borhullet. Sporene 14 kan også være anordnet på skrå i forhold til lengdeaksen og ha en stigning som svarer til stigningen av bormelspor. Sporene 14 kan imidlertid også gis en stigning som transporterer det bormel som oppstår i dette område, i retning mot borhodet 15. The drill bit 2 has a smooth shaft 13 which is provided with grooves 14 which are distributed around the circumference. The grooves 14 are located in the area of the largest shaft cross-section and serve as external air channels and as friction elements that prevent the drill from jamming in the drill hole. The grooves 14 can also be arranged at an angle in relation to the longitudinal axis and have a pitch that corresponds to the pitch of the boring grooves. However, the grooves 14 can also be given a rise that transports the drill flour that occurs in this area, in the direction of the drill head 15.
Boret 2 har en aksial, gjennomgående boring 16 som på tegningen er vist stiplet. Den gjennomgående boring 16 har sin minste diameter i området for borhullet 15 og det tilstøtende parti av borskaftet med minst skaftdiameter. I området for det utvidede skafttverrsnitt er den gjennomgående boring 16 gitt en større diameter, hvorved en vesentlig forbedring av bormelavsugningen skal oppnås. Avsugningsrommet 5 har en enda større diameter og er åpent ut mot avsugningsklokken 3 gj ennom store åpninger 6. Således får avsugningspassasjen et strømningstverrsnitt som stadig øker fra borhodespissen, og som fremmer en optimal avsugning av bormelet. The drill 2 has an axial, continuous bore 16 which is shown dashed in the drawing. The through bore 16 has its smallest diameter in the area of the drill hole 15 and the adjacent part of the drill shaft with the smallest shaft diameter. In the area of the extended shaft cross-section, the through-hole 16 is given a larger diameter, whereby a significant improvement of the bore suction is to be achieved. The suction chamber 5 has an even larger diameter and is open to the suction bell 3 through large openings 6. Thus, the suction passage has a flow cross-section that constantly increases from the drill head tip, and which promotes an optimal suction of the drill flour.
Avsugningsklokken 3 har en sideveis utragende avsugningsstuss 17 som på i og for seg kjent måte kan tilkobles en sugepumpe via en sugeslange som ikke er vist. The suction bell 3 has a laterally projecting suction nozzle 17 which can be connected to a suction pump via a suction hose, which is not shown, in a manner known per se.
Det skal påpekes at de sideveis utragende egger 18, 19 av en borplate 20 i borhodet 15 tjener til fremstilling av en underskjæring i et borhull. Den maksimale borhodediameter blir således fastlagt av sideeggene 18, 19 og er bare såvidt større enn den maksimale tverrsnittsutvidelse i området 21 av borskaftet. Tverrsnittsutvidelsen av borskaftet tjener som svingelager som tillater en fastlagt utsvingning av borhodet 15 i bunnen av borhullet. Det utvidede område 21 ligger herunder an mot borhullveggen. It should be pointed out that the laterally projecting edges 18, 19 of a drill plate 20 in the drill head 15 serve to produce an undercut in a drill hole. The maximum drill head diameter is thus determined by the side edges 18, 19 and is only slightly larger than the maximum cross-sectional expansion in the area 21 of the drill shank. The cross-sectional extension of the drill shank serves as a pivot bearing which allows a fixed swing of the drill head 15 at the bottom of the drill hole. The extended area 21 lies below against the borehole wall.
Fig. 3 viser boret 2 i området for borhodet 15. Den gjennomgående boring 16 forgrener seg og fører til avsugningsåpninger 22 som ligger på hver sin side av borplaten 20 i enden av borhodet 15. Således kan der i borhodet 15 være tildannet rette kanaler 23 som forener seg i borskaftet. Fig. 3 shows the drill 2 in the area of the drill head 15. The through bore 16 branches out and leads to suction openings 22 which are located on each side of the drill plate 20 at the end of the drill head 15. Thus, straight channels 23 can be formed in the drill head 15 which unites in the drill shaft.
På fig. 3 er borhodet 15 vist konisk utvidet, men det er også mulig å utforme borhullet som et rett skaftparti som vist på fig. 1. Ved konisk utvidet borhode foreligger der imidlertid mulighet for å anordne større avsugningsåpninger 22 enn ved et borhode med mindre diameter. In fig. 3, the drill head 15 is shown conically extended, but it is also possible to design the drill hole as a straight shaft part as shown in fig. 1. In the case of a conically extended drill head, there is, however, the possibility of arranging larger suction openings 22 than in the case of a drill head with a smaller diameter.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3835025A DE3835025A1 (en) | 1988-10-14 | 1988-10-14 | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
DE3903369A DE3903369A1 (en) | 1988-10-14 | 1989-02-04 | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
Publications (2)
Publication Number | Publication Date |
---|---|
NO894100D0 NO894100D0 (en) | 1989-10-13 |
NO894100L true NO894100L (en) | 1990-04-17 |
Family
ID=25873239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO89894100A NO894100L (en) | 1988-10-14 | 1989-10-13 | DRILLING TOOL FOR THE MANUFACTURE OF UNDERGROUND DRILL. |
Country Status (19)
Country | Link |
---|---|
EP (1) | EP0363617B1 (en) |
JP (1) | JPH0686052B2 (en) |
KR (1) | KR900006050A (en) |
CN (1) | CN1019774B (en) |
AU (1) | AU599862B2 (en) |
BR (1) | BR8905212A (en) |
CA (1) | CA2000054C (en) |
CS (1) | CS277058B6 (en) |
DE (2) | DE3903369A1 (en) |
DK (1) | DK497689A (en) |
ES (1) | ES2034536T3 (en) |
FI (1) | FI894582A (en) |
GR (1) | GR3005312T3 (en) |
HU (1) | HU206651B (en) |
NO (1) | NO894100L (en) |
PL (1) | PL162191B1 (en) |
PT (1) | PT91970B (en) |
RU (1) | RU1829988C (en) |
YU (1) | YU198789A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4014224A1 (en) * | 1990-05-04 | 1991-11-07 | Fischer Artur Werke Gmbh | DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
DE4132228A1 (en) * | 1991-09-27 | 1993-04-01 | Fischer Artur Werke Gmbh | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
JP2009012084A (en) | 2007-06-29 | 2009-01-22 | Okuma Corp | Cutting method |
CN104439397B (en) * | 2014-11-13 | 2017-03-29 | 贵州凯星液力传动机械有限公司 | A kind of processing method of High-precision Deep Hole composite drill |
DE102017125898A1 (en) * | 2017-11-06 | 2019-05-09 | Drebo Werkzeugfabrik Gmbh | Rock drilling arrangement and rock drill |
CN109719559B (en) * | 2019-01-29 | 2024-03-19 | 华工法利莱切焊系统工程有限公司 | Drilling scrap iron collecting system and steel plate machining center equipment |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR902101A (en) * | 1943-09-29 | 1945-08-20 | Schneider & Cie | Combination tool for metal drilling |
DE1203660B (en) * | 1963-06-15 | 1965-10-21 | Duss Maschf | Dust seal on a device for vacuuming the cuttings for a drilling tool for stone processing |
DE2349998C2 (en) * | 1973-10-05 | 1982-12-02 | Artur Dr.H.C. 7244 Waldachtal Fischer | Drilling unit for producing an undercut in the borehole |
DE2948682A1 (en) * | 1979-12-04 | 1981-06-11 | Friedrich Duss Maschinenfabrik GmbH & Co, 7265 Neubulach | Portable drill with dust-exhaustion equipment - has rear end of bit protruding into transverse passage in chuck |
DE3332806A1 (en) * | 1983-09-12 | 1985-03-28 | Artur Dr.H.C. 7244 Waldachtal Fischer | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
DE3335074A1 (en) * | 1983-09-28 | 1985-04-11 | Heinrich 6102 Pfungstadt Liebig | Undercutting drilling tool |
-
1989
- 1989-02-04 DE DE3903369A patent/DE3903369A1/en not_active Withdrawn
- 1989-08-26 EP EP89115757A patent/EP0363617B1/en not_active Expired - Lifetime
- 1989-08-26 DE DE8989115757T patent/DE58901943D1/en not_active Expired - Lifetime
- 1989-08-26 ES ES198989115757T patent/ES2034536T3/en not_active Expired - Lifetime
- 1989-09-25 AU AU41664/89A patent/AU599862B2/en not_active Ceased
- 1989-09-27 FI FI894582A patent/FI894582A/en not_active IP Right Cessation
- 1989-09-29 PL PL89281636A patent/PL162191B1/en unknown
- 1989-09-30 CN CN89107608A patent/CN1019774B/en not_active Expired
- 1989-10-02 CA CA002000054A patent/CA2000054C/en not_active Expired - Fee Related
- 1989-10-09 HU HU895257A patent/HU206651B/en not_active IP Right Cessation
- 1989-10-09 DK DK497689A patent/DK497689A/en not_active Application Discontinuation
- 1989-10-12 KR KR1019890014603A patent/KR900006050A/en not_active Application Discontinuation
- 1989-10-12 PT PT91970A patent/PT91970B/en not_active IP Right Cessation
- 1989-10-12 CS CS895799A patent/CS277058B6/en unknown
- 1989-10-13 NO NO89894100A patent/NO894100L/en unknown
- 1989-10-13 JP JP1265353A patent/JPH0686052B2/en not_active Expired - Lifetime
- 1989-10-13 YU YU01987/89A patent/YU198789A/en unknown
- 1989-10-13 BR BR898905212A patent/BR8905212A/en not_active IP Right Cessation
- 1989-10-13 RU SU894742112A patent/RU1829988C/en active
-
1992
- 1992-07-30 GR GR920400313T patent/GR3005312T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
DE58901943D1 (en) | 1992-09-03 |
CA2000054A1 (en) | 1990-04-14 |
HU895257D0 (en) | 1990-01-28 |
EP0363617A1 (en) | 1990-04-18 |
PT91970A (en) | 1990-04-30 |
HU206651B (en) | 1992-12-28 |
RU1829988C (en) | 1993-07-23 |
CS277058B6 (en) | 1992-11-18 |
BR8905212A (en) | 1990-05-15 |
KR900006050A (en) | 1990-05-07 |
ES2034536T3 (en) | 1993-04-01 |
NO894100D0 (en) | 1989-10-13 |
PT91970B (en) | 1995-08-09 |
DE3903369A1 (en) | 1990-08-09 |
HUT54554A (en) | 1991-03-28 |
FI894582A (en) | 1990-04-15 |
CA2000054C (en) | 1994-07-12 |
CS579989A3 (en) | 1992-06-17 |
AU599862B2 (en) | 1990-07-26 |
EP0363617B1 (en) | 1992-07-29 |
YU198789A (en) | 1991-06-30 |
CN1019774B (en) | 1992-12-30 |
AU4166489A (en) | 1990-04-26 |
DK497689A (en) | 1990-04-15 |
CN1041906A (en) | 1990-05-09 |
DK497689D0 (en) | 1989-10-09 |
JPH0686052B2 (en) | 1994-11-02 |
PL162191B1 (en) | 1993-09-30 |
JPH02150308A (en) | 1990-06-08 |
FI894582A0 (en) | 1989-09-27 |
GR3005312T3 (en) | 1993-05-24 |
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