EP0059675A1 - Vorrichtung zum schnellen Abkühlen von metallischen Rohren - Google Patents

Vorrichtung zum schnellen Abkühlen von metallischen Rohren Download PDF

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Publication number
EP0059675A1
EP0059675A1 EP82420026A EP82420026A EP0059675A1 EP 0059675 A1 EP0059675 A1 EP 0059675A1 EP 82420026 A EP82420026 A EP 82420026A EP 82420026 A EP82420026 A EP 82420026A EP 0059675 A1 EP0059675 A1 EP 0059675A1
Authority
EP
European Patent Office
Prior art keywords
tube
immersion
tank
tubes
deflector
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
Application number
EP82420026A
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English (en)
French (fr)
Other versions
EP0059675B1 (de
Inventor
Philippe-François Perineau
Yves Lebreton
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.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to AT82420026T priority Critical patent/ATE10950T1/de
Publication of EP0059675A1 publication Critical patent/EP0059675A1/de
Application granted granted Critical
Publication of EP0059675B1 publication Critical patent/EP0059675B1/de
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching

Definitions

  • the present invention relates to a device for cooling by immersion of hot metal tubes, devices which can, for example, intervene in the tube manufacturing cycle either immediately after hot forming of the tube, or for a specific heat treatment, such as for example quenching treatment.
  • metal tubes and in particular steel tubes generally requires forming, heat treatment and finishing operations.
  • a first family of techniques consists in parade treatment.
  • the hot tube is cooled by a liquid distributed by a sprinkler ring around the tube.
  • This method often requires, to avoid longitudinal deformations of the tube, to advance the tube with a helical movement, to plug the ends to prevent any untimely entry of water. It often even requires, in order to obtain a homogeneity of treatment in the longitudinal direction, to carry out the cooling at the outlet of a reheating oven which maintains the adequate temperature substantially constant in the rear part of the tube during its advance movement.
  • the second family of techniques consists of immersion treatment.
  • the process consists in completely and quickly immersing in a cooling tank filled with a coolant, the hot tube taken out of the hot forming tool or the hot treatment oven.
  • This method has the advantage of being simple and rapid, but has the major drawback of subjecting the tube to irregular cooling conditions, both on the length and on the section, given, in particular, the very irregular penetration of the coolant inside the tube.
  • the products treated are thin tubes or with a high external diameter / thickness ratio, for example greater than 20, significant longitudinal deformations known as "in the sleeve of a shirt” making it impossible or considerably hampering the subsequent work of the tube ; discomfort which, despite dressing operations, can be found on the quality of the finished products.
  • the present invention relates to a rapid cooling device by immersion of hot metal tubes of great length. This process does not have the drawbacks described above and leads to regular cooling.
  • the cooling device comprises means for transferring upstream the hot tubes, a quenching tank containing the coolant, means for transferring the hot tubes to the immersion device, a device for immersion, means of clamping the tube, means of recovery, removal and downstream transfer of the tubes.
  • It comprises a longitudinal deflector in the general shape of a trough or angle iron, placed at the lower right and at a short distance from the tube without being in contact with it. This deflector precedes the tube like a bow at the time of its first contact with the coolant then, when it descends into the tank containing the liquid. At the moment when, during the descent of the tube, its lower generatrix reaches the level of the liquid, the latter has been pushed aside and projected on both sides by the deflector.
  • the first contact between the tube and the liquid is thus slightly delayed.
  • this first contact instead of being made by the lower generatrix of the tube, is made symmetrically along two lateral generatrices close to those corresponding to the section of the tube by a horizontal diametral plane.
  • the deflector creates swirls and a symmetrical circulation of the liquid around the tube.
  • the cooling device also includes a system high flow air injection system attached to one end of the tube to be treated. This system injects pressurized air into the tube during the descent into the tank and immersion maintenance phase.
  • a plurality of pipes for circulating and stirring the coolant is distributed longitudinally in the tank, the liquid of which is maintained at a homogeneous temperature close to room temperature before immersion.
  • the tube Before immersion, the tube is positioned longitudinally on the immersion device, on the air injection side, and kept fixed in this position by a shoe, in order to allow the subjection system d h ir.
  • a hot tube to dip or hyper dip at least one end of which ends in a straight cut substantially perpendicular to the axis of the tube, is brought by a horizontal conveyor and parallel to the axis of the tank.
  • the tube is positioned relative to the tank using a retractable stop located at the front or rear end of the tube.
  • the tube is then supported by a lateral transfer system consisting, for example, of tilting arms keyed onto a common shaft, which moves it from the conveyor position to the immersion system position.
  • Immersion device collects the tube which is immediately longitudinally immobilized in this position by a clamping system carried by the immersion device, controlled by a pneumatic cylinder located in the vicinity of the end used to position 'the end that ends with a clean cut.
  • the air injection system consisting of an air nozzle is applied to the end of the tube on the side where it has been immobilized.
  • the tube is then suddenly immersed in the cooling liquid by lowering the immersion device and then kept immersed for the time necessary to obtain the desired cooling.
  • the deflector creates, in contact with the coolant, a vacuum, which causes the lower generator of the tube to drop to a level below that of the coolant in the tank, before coming into contact with the liquid.
  • the coolant passes over the wings of the deflector and simultaneously comes into contact with the tube along two lateral generators adjacent to the diametrically opposite generators. There is thus a symmetrical cooling from the first contact with the liquid.
  • an air nozzle carried by a flange forming a joint and abutting on the tube is introduced into the end of the tube which has a clean cut and which has been previously clamped. Air is injected at a high rate through this nozzle continuously during the entire treatment.
  • the nozzle with its flange remains immobilized at the end of the tube by a mechanical follower device associated with the tank.
  • the main purpose of the deflector is to make the circulation currents of the cooling fluid symmetrical during the descent phase. It is therefore important that, without being in contact with the tube, it is located at the immediate lower right of the latter. It can take several embodiments, for example the shape of a more or less open V-shaped angle iron, or, for example, the shape of a semi-circular rounded cradle or trough.
  • the deflector must be adapted to the size of the tubes to be treated. This can be achieved, among other things, by adjusting the width of its wings or, if it is in the form of an angle, by opening its folding angle or, finally, by adjusting the vertical distance which separates it from the tube.
  • the deflector extends, substantially continuously, over the entire length of the immersion device, but its construction can be such that it allows the passage of the supply and removal arm of the tubes.
  • the purpose of the air injection device in the tube is to avoid random introduction of the coolant into the tube.
  • the air flow and speed in the tube must be sufficient to ensure a large forced circulation.
  • the nozzle section and the air pressure at this level must be sufficient to ensure this circulation.
  • the section of the air nozzle must be adapted to the interior section of the tube to be quenched. Satisfactory operating conditions are obtained with the air under pressure from the network, that is to say of the order of 5 effective bars by using an internal section ratio of the tube to be cooled to nozzle section of the order of 3.
  • the coolant circulation and agitation injectors distributed longitudinally in the tank operate throughout the cooling period, from the start of the descent phase. This homogenizes the temperature of the coolant in the tank and promotes the removal of calories from the tube by the coolant.
  • the liquid in the tank is, moreover, recirculated at a constant level and its average temperature is maintained by a refrigeration system external to the quenching tank itself, at a value around their ambient temperature.
  • the tube is raised out of the coolant.
  • the air injection is then stopped, the air nozzle is uncoupled and the tube is freed from its clamping.
  • the tube is taken up by a removal device which lifts and laterally transfers the tube to lead to the later stages of manufacturing.
  • a conveyor parallel to the axis of the tank ensures this operation.
  • the removal device can, for example, consist of tilting arms and a momentary stop position can be provided to allow the drainage of the tube above the tank.
  • the device which is the subject of the invention can be designed so that the upstream and downstream conveying systems are separate or confused. When they are combined, the tubes are brought in on the same side with respect to the tank and by the same means as the transfer of the tube to the following manufacturing stations. Even, the lateral transfer system from the conveyor tube to the immersion system, the immersion system and the tube recovery system for lateral transfer after quenching, can be separate or common in whole or in part, a single device ensuring then the two or three functions without departing from the scope of the present invention.
  • All the lateral transfer devices used in the context of the present invention are of known and traditional design.
  • the cooling device object of the invention, can be used as a quenching system, either at the outlet of the heating furnace, or at the outlet of the tube hot forming tool, such as, for example, a glass. It is particularly well suited to the treatment of thin tubes with a large external diameter to thickness ratio, generally greater than 20, and a long length, of the order of 10 to 20 m.
  • the quenching line comprises, Figure 1 and Figure 2, a conveyor (1) equipped with rollers (2) on which moves a tube to be treated (3) here 100 mm.
  • the tank (4) is constructed parallel to the conveyor (1). It consists of a parallelepipedal block open at the top, made of sheet metal, placed on a base (5).
  • the coolant level in the tank is represented by (6).
  • the tank is filled with water, the temperature of which is maintained near ambient temperature by a conventional external device, not shown.
  • a plurality of lateral tubes (7) for water inlets is distributed throughout the tank and is supplied by general piping (8). The evacuation of the tank, allowing the level to remain constant, is not shown.
  • the lateral transfer device conveyor-immersion system and the immersion system consists of seven arms (9) with two branches (10-11) which are evenly distributed over the entire length of the tank.
  • the arms (10) of the arms (9) remove and deposit the tube (3) of the conveyor (1), the arms (11) constitute the immersion device.
  • the arms (9) are mounted on a common shaft (12) rotating in a plurality of bearings (13) mounted on beams (14) between the conveyor (1) and the tank (4). They are respectively marked (9a) to (9g).
  • the arms (9) are mounted in alignment with the shaft (12) so that the tube is immersed horizontally. They are moved simultaneously by a jack (15) fixed in two extreme positions corresponding to the conveyor position for the branch (10) and immersion for the branch (11).
  • the branch (10) manipulates the tube by its rounded (16).
  • the branch (11) manipulates the tube by its internal angle (17), as shown in FIG. 2.
  • An angle iron (18) is fixed on the branches (11) at a location located at the lower right of the tube (3) and close to the latter when the tube (3) arrives at the level (6) of the liquid.
  • This angle (18) extends over the entire length of the tank, from the first arm (9a) to the last arm (9g).
  • a device for clamping the tube not shown, conventionally constituted by a jack acting on a movable arm, the whole carried on the arm listed (9g) in FIG. 1, located in the immediate vicinity of the securing system of the nozzle. air injection on the end of the tube, ensures the clamping of the tube (3) in the interior corner (17) of the arm (9g) during immersion.
  • the device for securing the air injection nozzle (19) to the tube is shown in detail, FIGS. 3 and 4.
  • the entire system is carried by a special arm (20) mounted on the common shaft (12) and undergoing the same displacements as the arms (9).
  • the arm (20) comprises at (21) an interior angle similar to the angles (17) on which the tube (3) rests.
  • the air injection nozzle (19) is mounted on a flange (22) joining with the end (23) on the clamping side of the tube (3).
  • This flange is carried by an arm (24) pivoting about an axis (25) integral with the arm (20).
  • the flange (22) is pushed permanently against the end (23) of the tube (3) having a clean cut and previously positioned longitudinally by the rod (26) moved by the spring (27), a stop being provided so that the rod does not come out of its bore.
  • this movement of the flange towards the tube is compensated for by a contrary movement caused by the cam (28) acting on a crazy cylindrical roller (29) mounted on the pivoting arm (24).
  • the cam mounted on the shaft (30) rotating around the two bearings (31-32) fixed to the arm, is rotated during the descent of said arm for the immersion of the tube (3) by the system of two gears one of which is fixed and the other of which is mounted on the camshaft (30).
  • the profile of the cam is such that the flange (22) is pressed against the end of the tube (3) in the submerged position, the nozzle (19) then being engaged in the tube (3), as shown in Figures 3 and 4 , and separated from the end of the tube in the high position, before immersion or after immersion, the front end of the air injection nozzle (19) being released from the tube (3) to allow lateral transfer thereof.
  • the nozzle (19) is mounted by thread on the flange (22) so as to be able to adapt the nozzle diameter to the inside diameter of the tube (3) to be treated.
  • the nozzle diameter is generally such that the ratio between the internal section of the tube (3) and the section of the nozzle (19) is of the order of 3.
  • FIGS. 5A, 5B, 6A and 6B show various nonlimiting embodiments of angles (18) used as a deflector.
  • FIG. 5A represents an embodiment in which the angle iron (18) consists of two parts, one fixed (39) fixed by welding to the arm (11) and two wings (40) and (41) adjustable. The width of the opening at the end of the angle iron is adjusted by sliding the thread-bolt assembly (42) in the notch (43) of the wings (40) and (41).
  • the angle iron (18) is of defined dimensions, but it is fixed to the arm (9) by a threaded rod-bolt assembly (44) sliding in a vertical slot (45) located at right inside the angle (17) in the arm branch (11).
  • the angles are fixed in a coupled manner on either side of the branch (11).
  • the purpose of adjusting the angles (18) is to make the circulation of water symmetrical when the tubes are lowered into immersion. It is therefore necessary that the adjustment of the angle is appreciably adapted to the outside diameters of the tubes to be treated. This is obtained here by adjusting the wings or by the relative vertical position of the angle iron. Angles can also be used, the angular opening of the wings of which is adjustable.
  • the tube is thus transferred from (16) to (17) by rotation without sliding on the rectilinear part (46).
  • the system is designed in such a way that the immersion device constituted by the branch (11) and the angle (17) is not immersed when the tube comes from (16) at (17), while the rectilinear part (46) is substantially horizontal.
  • the front end of the air nozzle (19) is set back enough to allow free passage of the end of the tube (3).
  • the tube is then clamped by the jack acting on a movable arm mounted on the arm (9g).
  • the arms (9) then continue their rotation along arrow F and, simultaneously, air is injected into the tube (3).
  • the tube is quickly immersed by continuing the rotation of the arms (9).
  • the nozzle-holder flange (22Y is pressed against the straight edge end of the tube (3), thus leaving the air (3) is mainly submerged in the tube.
  • the tube (3) is kept submerged for the time necessary for it to cool down to the desired temperature.
  • the tube is then raised by rotating the arms (9) back. suffocated in the tube until the straight portion of the straight part (46) passes horizontally, which makes it possible to empty the tube (3) of all the water which could have infiltrated inside.
  • the duration of the cycle depends on the tubes to be treated. It is of the order of 30 seconds, without counting the actual immersion time, which is a function of the nuance of the metal and the dimensions of the tube.
  • the installation described has proved to be particularly advantageous for tubes of great lengths (greater than or equal to 15 m), of diameter 70 to 150 mm, having a high diameter to thickness ratio of the order of 25. They emerge from the treatment without appreciable longitudinal deformation.
  • the operating cycle of the cooling device is such that it can be used either at the outlet of a heating oven, or at the outlet of a hot forming tool, such as for example a glass spinning press, in order to subject the metal to quenching or hyper quenching.
  • FIG. 7 represents in section an alternative embodiment of the cooling device in which the hot tubes (47) are brought by a roller conveyor on one side of the cooling tank (48) and discharged cold on the other side of the tank by a conveyor not shown.
  • the arm (49) serves as a lateral transfer from the hot tube to the immersion device.
  • the immersion device is represented by the branch (51) of the arm (50) equipped with an angle iron (52), as in the embodiment described above.
  • the immersion is done by rotation of the arm (50) and the exit of the cold tube by the opposite rotation of the arm (50).
  • the device for securing the air injection nozzle at the end of the tube is unchanged. He is not shown here.
  • Another variant of the immersion device may allow the tubes to be immersed in an inclined manner, one end being in contact with the cooling fluid before the other end.
  • the inclination which can be a few degrees, can be obtained by a continuous relative angular offset of the arms (9) with respect to each other, or by thicknesses of the branch in the vertical direction to the right of the angle (17) continuously variable and increasing for the different arms (9) distributed along the tank or by any other suitable means.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Automatic Assembly (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP82420026A 1981-02-27 1982-02-24 Vorrichtung zum schnellen Abkühlen von metallischen Rohren Expired EP0059675B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420026T ATE10950T1 (de) 1981-02-27 1982-02-24 Vorrichtung zum schnellen abkuehlen von metallischen rohren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8104380 1981-02-27
FR8104380A FR2500849B1 (fr) 1981-02-27 1981-02-27 Dispositif de refroidissement rapide de tubes metalliques

Publications (2)

Publication Number Publication Date
EP0059675A1 true EP0059675A1 (de) 1982-09-08
EP0059675B1 EP0059675B1 (de) 1984-12-27

Family

ID=9255877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420026A Expired EP0059675B1 (de) 1981-02-27 1982-02-24 Vorrichtung zum schnellen Abkühlen von metallischen Rohren

Country Status (8)

Country Link
US (1) US4373703A (de)
EP (1) EP0059675B1 (de)
JP (1) JPS57164927A (de)
AT (1) ATE10950T1 (de)
DE (1) DE3261660D1 (de)
ES (1) ES509939A0 (de)
FR (1) FR2500849B1 (de)
SU (1) SU1190994A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109182686A (zh) * 2018-10-29 2019-01-11 平湖市法埃斯铝制品有限公司 铝型材的淬火冷却装置
CN113531969A (zh) * 2021-07-15 2021-10-22 广东海洋大学 一种玻璃器皿加工用快速均匀冷却设备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0637561U (ja) * 1992-10-13 1994-05-20 株式会社日本気化器製作所 エンジンの燃料微粒化促進装置
JP2006137997A (ja) * 2004-11-12 2006-06-01 Toyota Motor Corp 中空部材の焼き入れ装置及び焼き入れ方法
CN104032110A (zh) * 2014-05-06 2014-09-10 安徽旭鸿热处理有限公司 一种长条类零件淬火用支撑装置
CN114085964B (zh) * 2021-11-16 2023-10-10 江苏骏茂新材料科技有限公司 一种用于钢材输送平台的多腔室淬火装置
CN115383096A (zh) * 2022-09-22 2022-11-25 芜湖立升机械制造有限公司 一种零件铸造冷却装置及其使用方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984771A (en) * 1931-04-01 1934-12-18 Nat Tube Co Method of treating tubular products
FR878869A (fr) * 1941-02-04 1943-02-08 Rohrenwerke A G Deutsche Procédé de trempe d'objets allongés
DE758467C (de) * 1940-07-10 1953-06-22 Focke Wulf Flugzeugbau G M B H Verfahren zum doppelseitigen Haerten gewundener Rohrkoerper
US3212766A (en) * 1960-08-15 1965-10-19 Mannesmann Ag Apparatus for depth hardening long tubes
US3245671A (en) * 1963-04-08 1966-04-12 Takaishi Yoshio Cooling method and apparatus for hot rolled steel rod
US3623716A (en) * 1969-07-18 1971-11-30 Mannesmann Roehren Werke Ag Method and apparatus for hardening pipes internally and externally
US4032369A (en) * 1976-02-02 1977-06-28 The Timken Company Method for quenching ferrous tubing to achieve full hardening without quench cracking
FR2375922A1 (fr) * 1976-12-29 1978-07-28 Nippon Steel Corp Appareil pour le refroidissement par immersion de tubes metalliques chauds

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1713136A (en) * 1929-05-14 Ments

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984771A (en) * 1931-04-01 1934-12-18 Nat Tube Co Method of treating tubular products
DE758467C (de) * 1940-07-10 1953-06-22 Focke Wulf Flugzeugbau G M B H Verfahren zum doppelseitigen Haerten gewundener Rohrkoerper
FR878869A (fr) * 1941-02-04 1943-02-08 Rohrenwerke A G Deutsche Procédé de trempe d'objets allongés
US3212766A (en) * 1960-08-15 1965-10-19 Mannesmann Ag Apparatus for depth hardening long tubes
US3245671A (en) * 1963-04-08 1966-04-12 Takaishi Yoshio Cooling method and apparatus for hot rolled steel rod
US3623716A (en) * 1969-07-18 1971-11-30 Mannesmann Roehren Werke Ag Method and apparatus for hardening pipes internally and externally
US4032369A (en) * 1976-02-02 1977-06-28 The Timken Company Method for quenching ferrous tubing to achieve full hardening without quench cracking
FR2375922A1 (fr) * 1976-12-29 1978-07-28 Nippon Steel Corp Appareil pour le refroidissement par immersion de tubes metalliques chauds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109182686A (zh) * 2018-10-29 2019-01-11 平湖市法埃斯铝制品有限公司 铝型材的淬火冷却装置
CN113531969A (zh) * 2021-07-15 2021-10-22 广东海洋大学 一种玻璃器皿加工用快速均匀冷却设备

Also Published As

Publication number Publication date
DE3261660D1 (en) 1985-02-07
ATE10950T1 (de) 1985-01-15
EP0059675B1 (de) 1984-12-27
ES8302790A1 (es) 1983-01-16
FR2500849A1 (fr) 1982-09-03
JPS57164927A (en) 1982-10-09
US4373703A (en) 1983-02-15
SU1190994A3 (ru) 1985-11-07
ES509939A0 (es) 1983-01-16
FR2500849B1 (fr) 1986-06-06
JPS6112973B2 (de) 1986-04-11

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