SE500553C2 - Smoke control system for ships and fire fighting procedures on board ships - Google Patents

Smoke control system for ships and fire fighting procedures on board ships

Info

Publication number
SE500553C2
SE500553C2 SE9203299A SE9203299A SE500553C2 SE 500553 C2 SE500553 C2 SE 500553C2 SE 9203299 A SE9203299 A SE 9203299A SE 9203299 A SE9203299 A SE 9203299A SE 500553 C2 SE500553 C2 SE 500553C2
Authority
SE
Sweden
Prior art keywords
air
sections
fire
control system
smoke
Prior art date
Application number
SE9203299A
Other languages
Swedish (sv)
Other versions
SE9203299L (en
SE9203299D0 (en
Inventor
Oerjan Goetmalm
Gary Bergstroem
Original Assignee
Flaekt Ab
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 Flaekt Ab filed Critical Flaekt Ab
Priority to SE9203299A priority Critical patent/SE500553C2/en
Publication of SE9203299D0 publication Critical patent/SE9203299D0/en
Priority to AU54377/94A priority patent/AU5437794A/en
Priority to PCT/SE1993/000920 priority patent/WO1994010031A1/en
Priority to EP93924872A priority patent/EP0666811A1/en
Publication of SE9203299L publication Critical patent/SE9203299L/en
Publication of SE500553C2 publication Critical patent/SE500553C2/en
Priority to FI951974A priority patent/FI951974A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A62C3/10—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02—Ventilation; Air-conditioning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems

Abstract

A smoke control system for ships with at least two sections (22, 23), isolated from each other by bulkheads and decks. The system includes at least one fan unit (17; 18), air distributors (20, 21) for supply of fresh-air respective evacuation of consumed air from said sections, ducts (24) that connect the fan unit and the air distributors with each other and at least one fire detector (13) arranged in each section. A release of state of alert via a supervision unit (10) selectively generates a forced flue gas extraction from one or several sections in the ship and increases selectively the atmospheric pressure in other sections. The smoke control system includes extra, normally inactive exhausting points (25) for flue gas, arranged individually or in groups within each section which are selectively possible to activate via the supervision unit (10). The ordinary air conditioning system's flow and pressure in the exhaust air duct are reversed by detection of a state of fire. Flow and pressure in the intake air duct are kept at such levels so that spreading of smoke through them is prevented, from one accommodation to another.

Description

10 h _.. 2 Emellertid förekommer anlagda bränder på passagerarfartyg. 10 hrs _.. 2 However, fires occur on passenger ships.

Vid fall att saboteras invid den anlagda branden. Om elden är anlagd med sådana riskerar man sprinklermunstycken hjälp av brandfarlig vätska reduceras också sprinklersys- temets förmåga att släcka elden.In case that sabotaged next to the arson. If the fire is started with such you risk sprinkler nozzles with the help of flammable liquid, sprinkler systems are also reduced the ability of the theme to extinguish the fire.

TEKNISKA PROBLEMET Ändamålet med föreliggande uppfinning är att åstadkomma ett kontrollssystem som aktivt kan förhindra spridningen av brandgaser på fartyg.TECHNICAL PROBLEM The object of the present invention is to provide one control systems that can actively prevent the spread of fire gases on ships.

LÖSNING För detta ändamål kännetecknas anordningen enligt uppfin- ningen av att rökkontrollsystemet omfattar extra, normalt individuellt eller gruppvis anordnade inom varje sektion och selekterbart Förfarandet enligt kännetecknas av ordinarie luftkon- flöde frånluftkanal reverseras vid detektering av ett brandtillstånd, och att flöde och tryck i tilluftskanal bibehàlles vid nivåer så att rökspridning genom desamma, från ett utrymme till ett annat, förhindras. inaktiva utsugningspunkter för rökgas, aktiverbara via övervakningsenheten. att tryck i uppfinningen ditioneringssystems och BESKRIVNING AV RITNINGARNA Uppfinningen kommer nedan att beskrivas med hänvisning till utföringsexempel som visas på de bifogade ritningarna, på vilka Fig. 1 visar schematiskt i blockform ett rökkontrollsystem enligt uppfinningen, schematiskt ett passagerarfartygs olika utnyttjande av kontrollssystemet vid två olika brandtillstànd, och visar i perspektiv en sektion genom ett passagerarfartyg med enligt uppfinningen.SOLUTION For this purpose, the device according to the invention is characterized that the smoke control system includes extra, normally individually or grouped within each section and selectable The procedure according to characterized by ordinary air con- flow exhaust air duct reversed upon detection of a fire condition, and that flow and pressure in the supply air duct are maintained at levels so that smoke spread through them, from one space to another, prevented. inert flue gas extraction points, activatable via the monitoring device. to press i the invention ditioning systems and DESCRIPTION OF THE DRAWINGS The invention will be described below with reference to exemplary embodiments shown in the accompanying drawings, on which Fig. 1 shows schematically in block form one smoke control system according to the invention, schematically a passenger ship various use of the control system at two various fire conditions, and shows in perspective a section through one passenger ships with according to the invention.

Fig. 2 och 3 visar uppdelning i rökskyddszoner och Fig. 4 rökkontrollsystemet _.. f.Figs. 2 and 3 show division into smoke protection zones and Fig. 4 the smoke control system _ .. f.

(H 3 BESKRIVNING AV UTFÖRINGSEXEMPEL Fig. 1 visar de i ett rökkontrollsystem enligt uppfinningen ingående delsystemen som övervakas av en styrenhet medelst en exempelvis på kommandobryggan placerad bildskärm 10 eller kontrollpanel.(HRS 3 DESCRIPTION OF EMBODIMENTS Fig. 1 shows them in a smoke control system according to the invention constituent subsystems monitored by a control unit by means of a monitor 10, for example, placed on the command bridge or control panel.

Delsystemen är uppdelade i två huvudgrupper ll, 12, av vilka den förstnämnda kan innehålla branddetektorer 13, sprinkler- system/larmsirener 14, branddörrar 15 och rökluckor 16, vilka olika delsystem normalt används för detektering av brandtillstånd och minimering av en brands skadeverkningar.The subsystems are divided into two main groups 11, 12, of which the former may include fire detectors 13, sprinkler systems / alarm sirens 14, fire doors 15 and smoke hatches 16, which different subsystems are normally used to detect fire condition and minimization of a fire's harmful effects.

Den andra gruppen kan omfatta värmetàliga högkapacitets- fläktar 17, luftkonditioneringsenheter 18, mekanisk 'ven- tilation 19, eld-, brand- och halonspjäll 20 och fjärrstyr- bara ventilationsdon 21 för tillförsel av friskluft respek- tive utsug av förbrukad luft.The second group may include high-capacity thermal fans 17, air conditioners 18, mechanical 'ven- tilation 19, fire, fire and halon dampers 20 and remote control only ventilation device 21 for the supply of fresh air resp. extraction of spent air.

Luftkonditioneringsenheterna är anslutna till ventilations- donen 20, 21 via separata kanaler för till- och frànluft.The air conditioning units are connected to the ventilation means 20, 21 via separate ducts for supply and exhaust air.

I sin enklaste form kan rökkontrollsystemet omfatta styrenheten 10, brandlarmen 13, luftkonditioneringsenheterna 18 och ventilationsdonen 20, 21. Därvid måste luftkon- ditioneringsenheterna förses med skyddsmedel, så att de tål de heta rökgaserna under den tid en brand kan pågå. Dessa skyddsmedel kan exempelvis omfatta organ för injicering av ett kylmedium, t.ex. vatten eller insugning av kylluft för spolluftkylning. Dessutom bör värmetåligt isolerade kablar användas för matning av elström och för signalkablar.In its simplest form, the smoke control system may include the control unit 10, the fire alarms 13, the air conditioning units 18 and the ventilation devices 20, 21. In this case, the air the units are provided with protective agents so that they can withstand the hot flue gases during the time a fire can last. These protective agents may include, for example, means for injecting a refrigerant, e.g. water or suction of cooling air for purge air cooling. In addition, heat-resistant insulated cables be used for power supply and for signal cables.

I händelse av brand styrs detta rökkontrollsystem (se Fig. 2 och 3) på så sätt att luftkonditioneringsenheterna bringas att suga luft från den brandskyddszon i vilken brandförekomst detekterats, fartygets maskinrum 22 i Fig. 2, så att ett undertryck uppstår i denna brandskyddszon.In the event of a fire, this smoke control system is controlled (see Fig. 2 and 3) in such a way that the air conditioning units are brought to suck air from the fire protection zone in which fire occurrence detected, the ship's engine room 22 in Fig. 2, so that a negative pressure arises in this fire protection zone.

Samtidigt kortsluts ventilationssystemet till övriga delar av fartyget, så att tilluft tillförs både via tilluftkanalen och frånluftkanalen. Härvid uppstår ett övertryck i övriga _., F, « ä- 'v 4 delar av fartyget och man förhindrar att röken förs vidare från den av brand drabbade zonen via ventilationssystemet till övriga delar av passagerarfartyget.At the same time, the ventilation system is short-circuited to other parts of the vessel, so that supply air is supplied both via the supply air duct and the exhaust air duct. This creates an overpressure in the others _., F, «Ä- 'v 4 parts of the ship and the smoke is prevented from being passed on from the fire-affected zone via the ventilation system to other parts of the passenger ship.

Fig. 3 åskådliggör hur en i en annan del av fartyget, t.ex. en hytt 23 pågående brand påverkar styrningen av ventila- tionssystemet.Fig. 3 illustrates how one in another part of the ship, e.g. a cabin 23 ongoing fire affects the control of the system.

Uppfinningen visas i sin fördelaktigaste form med hänvisning till Fig. 4. I detta utföringsexempel av uppfinningen har fartyget försetts med separata kanalsystem 24 för evakuering av rökgaser. Dessa kanaler sträcker sig från spjällförsedda luftdon 25 upp till speciella värmekapslade höghastighets- fläktar Kanalerna 24 sträcker sig i huvudsak parallellt med luftkon- ditioneringsenheternas 18 tillufts- och frånluftskanaler 27a resp. 27b, via intill trapphus 28 anordnade vertikaltrunkar 29 till varje hyttplan, och till ändarna av de gångar 30 som 26 för forcerad extraktion av heta rökgaser. horisontellt förbinder två närbelägna trapphus.The invention is shown in its most advantageous form by reference to Fig. 4. In this embodiment of the invention the vessel is equipped with separate duct systems 24 for evacuation of flue gases. These channels extend from dampers air diffusers 25 up to special heat-encapsulated high-speed fans The ducts 24 extend substantially parallel to the air con the supply air and exhaust air ducts 27a of the ditioning units 18 resp. 27b, via vertical trunks arranged next to stairwells 28 29 to each cab floor, and to the ends of the aisles 30 which 26 for forced extraction of hot flue gases. horizontally connecting two nearby stairwells.

I händelse av brand styrs detta rökkontrollsystem så att ventilationssystemet kortsluts, så att tilluft tillförs både via tilluftkanalen 27a och frånluftkanalen 27b i andra delar av fartyget, dvs. även speciellt till den av brand drabbade zonen. Undertryck alstras samtidigt enbart i denna sektion medelst höghastighetsfläktarna 26.In the event of a fire, this smoke control system is controlled so that the ventilation system is short-circuited, so that supply air is supplied to both via the supply air duct 27a and the exhaust air duct 27b in other parts of the vessel, i.e. also especially to the one affected by fire zones. Negative pressure is generated at the same time only in this section by means of the high speed fans 26.

Kanalerna 24 kan även delvis utgöras av vertikaltrunkarna 29, vilket förenklar dragning av kanaler.The channels 24 can also partly consist of the vertical trunks 29, which simplifies ducting.

För att förhindra ingress av brandrök från den av brand drabbade sättes trapphuset 28 samtidigt under övertryck av ventilationssystemet. zonen in i trapphuset, Genom användning av uppfinningen på passagerarfartyg blir det möjligt att utnyttja branddörrar för evakuering av människor och för bekämpning av branden.To prevent the ingress of fire smoke from that of fire affected, the stairwell 28 is placed at the same time under overpressure of the ventilation system. the zone into the stairwell, By applying the invention to passenger ships it is possible to use fire doors for evacuation of people and to fight the fire.

Uppfinningen är ej begränsad till de ovan beskrivna utföringsexemplen, utan flera varianter är tänkbara inom ramen för efterföljande krav.The invention is not limited to those described above embodiments, but several variants are conceivable within framework of subsequent requirements.

Claims (6)

10 15 20 25 30 35 PATENTKRAV10 15 20 25 30 35 PATENT REQUIREMENTS 1. Rökkontrollsystem för fartyg med minst två medelst skott och däck från varandra avskilda sektioner (22, 23), vilket system omfattar minst en fläktenhet (17: 18), luftdon (20, 21) för tillförsel av friskluft respektive utsug av förbrukad luft från nämnda sektioner, kanaler (24) som förbinder fläktenheten och luftdonen med varandra och minst en :i varje sektion anordnad branddetektor (13), som vid utlösning av larmtillstánd via en övervakningsenhet (10) selektivt alstrar en forcerad rökgasextraction från en eller flera sektioner i fartyget och selektivt ökar lufttrycket i k ä n n e t e c k n a t: andra sektioner, därav, att rökkontrollsystemet omfattar extra, normalt inaktiva utsugningspunkter (25) för rökgas, individuellt eller gruppvis anordnade inom varje sektion och selekterbart aktiverbara via övervakningsenheten (10).Smoke control system for ships with at least two sections (22, 23) separated by bulkheads and decks, which system comprises at least one fan unit (17: 18), air diffusers (20, 21) for supply of fresh air and extraction of consumed air from said sections, ducts (24) connecting the fan unit and the air diffusers to each other and at least one: fire detector (13) arranged in each section, which upon triggering an alarm condition via a monitoring unit (10) selectively generates a forced flue gas extraction from one or more sections of the vessel and selectively increases the air pressure not indicated: other sections, of which the smoke control system comprises additional, normally inert exhaust points (25) for flue gas, individually or in groups arranged within each section and selectably activatable via the monitoring unit (10). 2. Kontrollssystem enligt kravet 1, k ä n n e t e c k n a t därav, att fläktenheten (17: 18) omfattar medel för inspädning av ett kylmedium på fläktens sugsida.2. Control system according to claim 1, characterized in that the fan unit (17:18) comprises means for diluting a cooling medium on the suction side of the fan. 3. Kontrollssystem enligt kravet l eller 2, k ä n n e t e c k n a t därav, att övervakningssystemet (10) kommunicerar med minst en rökgastàlig högkapacitetsfäkt (17), med mekanisk ventilation (18, 19) och med styrbara luftdon (20, 21).Control system according to Claim 1 or 2, characterized in that the monitoring system (10) communicates with at least one flue gas high-capacity fan (17), with mechanical ventilation (18, 19) and with controllable air devices (20, 21). 4. Kontrollssystem enligt något av kraven 1-3, k ä n n e t e c k n a t därav, att övervakningssystemet (10) kommunicerar med i fartyget anordnade branddetektorer (13), sprinklersystem (14), larmsirener och utlösbara branddörrar (16) och rökluckor (15). lO 15 20 25 v' e; xß ~. * 7Control system according to one of Claims 1 to 3, characterized in that the monitoring system (10) communicates with fire detectors (13), sprinkler systems (14), alarm sirens and triggerable fire doors (16) and smoke hatches (15) arranged in the ship. 10 15 20 25 v 'e; xß ~. * 7 5. Förfarande vid bekämpning av brand ombord på fartyg med minst två medelst skott och däck från varandra avskilda sektioner (22, 23), vilket fartyg är försett med ett ventilationssystem omfattande minst en fläktenhet (17, 18) och luftdon (20, 21), vilka normalt används för tillförsel av friskluft respektive utsug av förbrukad luft från nämnda sektioner, samt kanaler (24, 27) som förbinder fläktenheten lufttrycket dels reduceras genom forcerad rökgasextraction från den eller de och luftdonen med varandra, varvid sektioner som branden har fått fäste i, och dels ökas åtminstone i de närmast omgivande sektionerna, k ä n n e t e c k n a t därav, att ordinarie luftkon- ditioneringssystems flöde och tryck i frànluftkanal (27b) reverseras vid detektering av ett brandtillstånd, och att flöde och tryck i tilluftskanal (27a) bibehålles vid nivåer så att rökspridning genom desamma, från ett utrymme till ett annat, förhindras.A method of combating fire on board ships with at least two sections (22, 23) separated by bulkheads and decks, which ship is provided with a ventilation system comprising at least one fan unit (17, 18) and air diffusers (20, 21) , which are normally used for the supply of fresh air and extraction of consumed air from said sections, as well as ducts (24, 27) which connect the fan unit the air pressure and are reduced by forced flue gas extraction from the one or they and the air devices with each other. , and partly increased at least in the nearest surrounding sections, characterized in that the flow and pressure of ordinary air conditioning systems in exhaust air duct (27b) is reversed upon detection of a fire condition, and that flow and pressure in supply air duct (27a) are maintained at levels so that the spread of smoke through them, from one space to another, is prevented. 6. Förfarande enligt kravet 5, k ä n n e t e c k n a t därav, att normalt inaktiva och individuellt eller gruppvis selekterbara utsugningspunkter (25) aktiveras, för forcerad extraction av rökgaser från. den eller' de sektioner som branden har fått fäste i.6. A method according to claim 5, characterized in that normally inactive and individually or group selectable extraction points (25) are activated, for forced extraction of flue gases from. the section or sections in which the fire has taken hold.
SE9203299A 1992-11-04 1992-11-04 Smoke control system for ships and fire fighting procedures on board ships SE500553C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9203299A SE500553C2 (en) 1992-11-04 1992-11-04 Smoke control system for ships and fire fighting procedures on board ships
AU54377/94A AU5437794A (en) 1992-11-04 1993-11-03 Smoke control system for ships
PCT/SE1993/000920 WO1994010031A1 (en) 1992-11-04 1993-11-03 Smoke control system for ships
EP93924872A EP0666811A1 (en) 1992-11-04 1993-11-03 Smoke control system for ships
FI951974A FI951974A (en) 1992-11-04 1995-04-26 Smoke control system for ships

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9203299A SE500553C2 (en) 1992-11-04 1992-11-04 Smoke control system for ships and fire fighting procedures on board ships

Publications (3)

Publication Number Publication Date
SE9203299D0 SE9203299D0 (en) 1992-11-04
SE9203299L SE9203299L (en) 1994-05-05
SE500553C2 true SE500553C2 (en) 1994-07-11

Family

ID=20387713

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9203299A SE500553C2 (en) 1992-11-04 1992-11-04 Smoke control system for ships and fire fighting procedures on board ships

Country Status (5)

Country Link
EP (1) EP0666811A1 (en)
AU (1) AU5437794A (en)
FI (1) FI951974A (en)
SE (1) SE500553C2 (en)
WO (1) WO1994010031A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3567397B2 (en) * 1996-04-22 2004-09-22 清水建設株式会社 Smoke control system
DE19825420C2 (en) 1998-06-06 2000-03-30 Hartmut Ewald Process and device for smoke and heat extraction and for operating ventilation for traffic structures and rooms
EP1014008A3 (en) * 1998-12-21 2003-05-28 Hübler Sicherheit und Service GmbH Smoke ventilation system
DE19904428C2 (en) * 1999-02-04 2001-05-31 Axel Kretzschmar Mechanical smoke and heat exhaust system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1479793A (en) * 1975-04-02 1977-07-13 Kg Smoke Dispersal Ltd Fire safety systems
GB2193890A (en) * 1986-07-04 1988-02-24 George Alfred Forbes Method and system for inhibiting the spread of combustion products in marine or building structures
US4765231A (en) * 1987-03-23 1988-08-23 Aniello Michael J Smoke exhausting air conditioning system
US4944216A (en) * 1989-11-13 1990-07-31 Mccutchen Wilmot R Building emergency exhaust fan system

Also Published As

Publication number Publication date
WO1994010031A1 (en) 1994-05-11
EP0666811A1 (en) 1995-08-16
SE9203299L (en) 1994-05-05
FI951974A0 (en) 1995-04-26
SE9203299D0 (en) 1992-11-04
FI951974A (en) 1995-05-04
AU5437794A (en) 1994-05-24

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