JP2009202155A - Laboratory table with desktop fume hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laboratory table with a desktop fume hood which can ensure high convenience, workability and safety even when installed in a narrow laboratory. <P>SOLUTION: The desktop fume hood 30 is provided with: erect partition walls 32 for dividing the working space on a top board 11 of the laboratory table 10 into a plurality of divided chambers; and exhaust ducts 37, 40 for discharging exhaust gasses independently from divided chambers U1, U2. Each of divided chambers U1, U2 is provided with facilities such as a liquid waste-exclusive sink 431 or 432, a drain and an outlet required to perform an experiment. Four experimenters, two experimenters on the front side of the laboratory table 10 and two experimenters on the back side thereof while standing side by side, can use divided chambers and advance their own experiments efficiently in good working environments without interfering with one another. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an experimental table used when conducting various experimental studies at universities, various research institutions, and the like, and more specifically, surrounds the periphery of the experimental table with a hood and ventilates the enclosed space. The present invention relates to a table hood facility having an evacuation means for performing the above and an experimental table including the facility.

  In chemical experiments conducted at universities, various research institutions, etc., gases generated from organic solvents and various reagents used in experiments, or gases generated in the course of experiments may be harmful to the human body. For this reason, in order to prevent various gases generated in such experiments from diffusing into the room and expelling them to the outside of the room quickly, it has been conventionally practiced to install an experimental bench or a local exhaust system in the vicinity thereof. ing.

  For example, Patent Document 1 discloses an exhaust hood for installation on the top of an experimental table. Patent Document 2 discloses a test bench in which a recess is formed in a part of the top plate and an exhaust facility having an exhaust port is provided in the recess. Furthermore, in order to more reliably prevent harmful gases from diffusing into the room and enhance the exhaust effect, a table hood facility (called a table-top exhaust hood, etc.) installed on the table to surround the experiment table However, here, the table-top hood equipment is generically named).

It has been generally performed to install various kinds of chemical experiments in a space formed by installing such tabletop hood equipment on a laboratory bench. However, such experimental benches equipped with tabletop hood equipment have the following various problems.
(1) When two or more experimenters want to perform different experiments on the same laboratory table, they are affected by the gas generated by the experiment of other experimenters or, in some cases, scattered by the work of other experimenters. There is a possibility that chemicals and the like may be mixed in, and workability and convenience are not sufficiently high.
(2) When the front door is opened and closed, the exhaust air volume changes greatly, and the working tool may fall over, which may hinder the work. It is also conceivable that the power consumption of the exhaust fan increases, or that the air-conditioned air in the laboratory is undesirably discharged, thereby increasing the power consumption of the indoor air conditioning.
(3) In many cases, the front door is a sliding door or a single door that opens and closes up and down, but it is difficult to operate and work on the upper side of the experimental research facility installed in the hood.
(4) The experimenter must once collect the waste liquid used in the experiment in a bottle and take it to a predetermined waste liquid tank for disposal, which is cumbersome and easily causes errors such as spilling the waste liquid.
(5) Since there is no room to place peripheral devices and equipment used in the experiment on the test bench, they are often placed in passages and the like, causing problems in workability and safety.

Japanese Utility Model Publication No. 63-40745 JP-A-6-142529

  The present invention has been made in order to solve the various problems as described above, and its main purpose is excellent workability and safety, particularly work when a plurality of experimenters conduct experiments at the same time. It is to provide a table hood facility and an experimental table with a table hood facility in consideration of safety and convenience.

The tabletop hood facility according to the present invention, which has been made to solve the above-mentioned problems, is installed on the top plate of an experimental table, and surrounds the hood and the exhaust for ventilating the space surrounded by the hood. A tabletop hood facility including means,
An upright partition wall for partitioning the work space on the top plate into a plurality of parts, and an exhaust structure for exhausting air without interfering with each other from the compartments partitioned by the partition wall;
It is characterized by having.

  As a specific aspect of the tabletop hood facility according to the present invention, the partition wall is provided in a substantially cross shape when viewed from above, and the top plate of the experimental table is divided into four substantially the same size. It can be set as the structure which forms an individual compartment.

  That is, when the desktop hood facility according to the present invention is installed on the top plate of the experimental bench, the space on the top plate of the experimental bench is divided into a plurality (for example, four sections) by the partition wall of the desktop hood facility. Each compartment divided by this partition wall becomes an independent space, and different experimenters can perform different operations in each compartment. Further, since these four compartments are exhausted so as not to interfere with each other by the exhaust structure (and the tabletop hood equipment itself or an exhaust fan provided outside thereof), an experimental work in a certain compartment is performed. Various gases generated in the above process do not leak into other compartments, and are quickly discharged from the compartments where the gases are generated.

  Therefore, according to the tabletop hood facility according to the present invention, even if a plurality of experimenters simultaneously perform experiment work in different compartments, the work is not hindered and high workability can be ensured. Even if the laboratory itself is small and there is not enough space for installing a plurality of experimental benches, it is possible for a plurality of experimenters to perform different experimental work at the same time as long as one experimental bench is installed. Therefore, it has high convenience and can reduce the introduction cost for the user.

  Further, in the tabletop hood facility according to the present invention, in order to reduce the variation in the wind speed over the entire opening surface, a long slit is formed in the approximate center of the baffle plate facing the door body that the experimenter opens and closes, and the slit is passed through the slit. It is good to set it as the structure which guides the air which flowed in from the opening surface when a door body is open | released to an exhaust structure. According to this, the airflow flowing into the compartment from the opening surface is stabilized, and for example, it becomes easy to ensure a value (0.5 m / s) conforming to the provisions of the Industrial Safety and Health Act. In addition, the local increase in air volume is mitigated, and it is difficult for appliances to fall over. Further, it is not necessary to increase the exhaust capacity of the exhaust fan more than necessary, and air that has been air-conditioned in the laboratory is not exhausted more than necessary. Thereby, the power consumption of the entire laboratory can be suppressed.

  In the tabletop hood facility according to the present invention, each of the compartments partitioned by the partition wall includes a door body that is divided into upper and lower portions and includes an upper door body and a lower door body that can be seen through the interior. The body has a structure in which the upper door body and the lower door body can be interlocked and opened upward, and only the upper door body can be opened upward while the lower door body is closed. It is good to do.

  In other words, the experimenter may open the upper door body and the lower door body in conjunction with each other when working with the front face wide open, or may be used for an instrument or the like disposed in the upper space in the compartment. When it is desired to perform the operation, it is only necessary to open only the upper door upward while keeping the lower door closed. Since the door opening method can be selected according to the work content in this way, the workability is good and the experiment can be advanced efficiently.

  Moreover, in the experimental bench provided with the tabletop hood equipment according to the present invention as described above, it is preferable that a space for accommodating various equipment necessary for the experiment is provided in a space below the top plate of the experimental bench. . Specifically, for example, peripheral devices, chemical bins, trash cans, fire extinguishers, and the like can be incorporated in this space, so that these various equipments do not protrude into the passage, increasing convenience and performing work efficiently. In addition, it is possible to ensure high safety without hindering people passing through the passage.

  The desk hood equipment may be provided with a waste liquid dedicated sink for each compartment, and the waste liquid dedicated sink is connected to a waste liquid tank accommodated in a space below the experimental bench by a pipe. According to this, since the experimenter can drain waste liquid such as solvent that is no longer necessary during the work to the dedicated waste liquid sink, the workability is good and each experimenter carries the waste liquid individually. Accidents such as accidental spills can be reduced.

  Further, the desktop hood equipment and the experimental table may each have a knockdown structure that can be easily assembled. According to this, since it should just carry in to a laboratory (or laboratory) in the state decomposed | disassembled into several members and to assemble after that, even if the entrance / exit of a laboratory is comparatively narrow, it can carry in without difficulty. In addition, the number of workers devoted to such carrying-in / installation can be reduced.

  The top plate of the experimental table is preferably formed with a drain port having a lid. As a result, for example, when some solvent is spilled on the top plate or the top plate is soiled, the dirty water can be discharged from the drain by flowing water through the top plate. In addition, by closing the top of the drainage port with a lid, it is possible to prevent objects from falling into the drainage port, and the experimenter inadvertently disposes waste liquid etc. that should not flow into the drainage port. There is also an effect that it can be prevented from flowing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front external view of an experimental bench with a desktop hood equipment removed from a laboratory bench with a bench hood equipment according to an embodiment of the present invention. Top view of the test bench with the tabletop hood equipment removed. The right side external view of the experimental stand in the state where the tabletop hood equipment is removed. The A-A 'line cross section and B-B' line cross section in FIG. The front external view of the experiment stand in the state where the desk hood equipment was attached. Top view of the test bench with the tabletop hood installed. A right side perspective view of a tabletop hood facility. The schematic diagram which shows the flow of the air at the time of exhaust_gas | exhaustion in a tabletop hood installation.

  An experimental table with a tabletop hood equipment according to an embodiment of the present invention will be described with reference to FIGS. FIGS. 1 to 4 are external views with various equipments mounted on a test bench and a table hood facility removed, FIG. 1 is a front view, FIG. 2 is a top view, FIG. 3 is a right side view, and FIG. These are the sectional view on the AA 'line in FIG. 1, and the sectional view on the BB' line. 5 and 6 are a front external view and a top external view with the desktop hood equipment attached, FIG. 7 is a right side perspective view of only the desktop hood equipment, and FIG. 8 is a schematic diagram showing the flow of air during exhaust. is there. In order to facilitate understanding, in FIG. 6 and FIG. 7, portions that are not cross sections are appropriately filled with diagonal lines. In addition, some symbols used in the description may not appear on the drawing because they are hidden behind the surface.

  The laboratory bench with a bench hood equipment of this example is a laboratory bench 10 equipped with a knock-down bench hood equipment 30 on a laboratory bench 10 that can be used alone, and is usually the center (corner) of the laboratory or laboratory. The experimenter works from two directions, the front direction and the rear direction.

  As shown in FIGS. 1 to 3, the experimental table 10 is a flat plate having a size of, for example, a width of 3000 mm, a depth of 1500 mm, and a thickness of 20 mm, and includes a top plate 11 having a phenol resin surface special finish on the upper surface. The height from the floor surface to the upper surface of the top plate 11 is, for example, 880 mm. The top plate 11 may be a single plate, but here it is divided into four pieces of the same size, and these are assembled on site (laboratory). The top plate 11 is a work space for experimental research and is divided into four sections by a partition wall of a tabletop hood as will be described later. In the following description, the symbols U1 to U4 are given to the four compartments formed by the partition walls.

  The top plate 11 is provided with drainage ports 121 to 124 provided with lids and vent holes 13 and 14 for each range corresponding to each of the compartments U1 to U4. The drain ports 121 to 124 are formed by embedding drain traps under the top plate 11, and each drain trap is connected to a normal drain groove through a drain pipe (not shown). The drain ports 121 to 124 are used when water flows from a water faucet, which will be described later, onto the top plate 11 and the dirty water is removed from the top plate 11 when the top plate 11 becomes dirty. It is closed with a lid during the experiment).

  The ventilation hole 13 penetrates the top plate 11 and communicates the top of the top plate 11 and the blow-through portion 19. Two waste liquid tanks 20 are installed in the blow-off portion 19, and waste liquid such as used organic solvent is stored in the waste liquid tank 20. The vent hole 13 is for sucking gas that volatilizes from the waste liquid to the top of the top plate 11. On the other hand, a cylindrical ventilation duct 15 provided with ventilation holes 15a at appropriate locations as shown in FIG. The ventilation duct 15 is located behind a chemical storage 24 described later. Some of the gas volatilized from various chemicals stored in the medicine cabinet 24 has a specific gravity greater than that of air and accumulates near the floor surface. The ventilation duct 15 stores the gas accumulated near the floor surface. This is for effectively sucking the top plate 11 upward.

  Below the top plate 11, a plurality of (four in this example) drawer units 161 to 164 are provided at the end of each of the compartments U1 to U4, and the back has a function of concealing various pipes and the like inside. A board 17 is provided. The backboard 17 is provided with an AC outlet 18 for powering various equipments installed in a space in front of the backboard 17. In this embodiment, trash bins 211 to 214, oil rotary pumps (vacuum pumps) 221 to 224, and refrigerant circulation devices 231 to 234 are installed in the space in front of the backboard 17 as equipment provided for each of the compartments U1 to U4. Has been. In addition, as equipment that is commonly used in the two compartments U1 and U2 and U3 and U4 arranged side by side, a fire extinguisher 25 is provided in a space in front of the backboard 17, and a chemical warehouse 24 is provided in a space without the backboard 17. Is housed. As shown in FIG. 1, since the chemical storage 24 is accommodated immediately below the compartment U1, the width of the space in front of the backboard 17 is narrowed accordingly. Therefore, the refrigerant circulation device 231 that should be accommodated here is installed directly below the compartment U2. Although not shown, the same applies to the compartments U3 and U4 on the rear side.

  Further, immediately below the top plate 11, for each of the compartments U1 to U4, pump switches 261 to 264 for turning on / off the AC outlet for the vacuum pump, and AC outlets 281 to 284 are provided as options. Aspirator switches 271 to 274 for turning on / off the aspirator device are provided.

  As described above, in the experimental bench 10 according to the present embodiment, various equipment and devices necessary for the experiment can be efficiently accommodated in the space below the top plate 11, and such equipment and devices protrude from the passage and the like. This is useful not only for improving workability but also for ensuring the safety of the passage.

  A tabletop hood facility 30 is mounted on the experimental table 10 described above. The frame of the tabletop hood facility 30 basically has a structure in which both side portions 31a and the ceiling 31b are closed, and the front side and the rear side are open so that the experimenter can approach the experiment table 10. ing. In order to divide the space on the experimental table 10 into four as described above, the tabletop hood facility 30 has a partition wall 32 that extends in the front-rear direction at the left and right substantially centers and stands upright, and the left and right at the front and rear centers. A partition wall 33 extending in the direction and standing upright. The partition walls 32 and 33 divide the space on the experimental table 10 into four spaces. However, in practice, it is necessary to secure a piping space or the like. Side plates 34 are erected apart from each other, and back plates 35 are erected on both sides of the partition wall 33 so as to be separated from the partition wall 33 by a predetermined distance. Therefore, the space surrounded by the side plate 34 and the back plate 35 is a space where the experimenter can actually work in each of the compartments U1 to U4.

  In each of the compartments U1 to U4, on the front side as viewed from the direction the experimenter approaches (that is, the front side in the compartments U1 and U2 and the rear side in the compartments U3 and U4 in the drawing) The door bodies 421 to 424 that are made of tempered glass and can be opened and closed are provided. In the door bodies 421 to 424, the upper door bodies 421a to 424a on the near side can be opened upward alone. Further, when the lower door bodies 421b to 424b on the back side are pulled upward, only the lower door bodies 421b to 424b are opened until halfway, and after being raised to the vicinity of the lower ends of the upper door bodies 421a to 424a, the upper door body 421a. ˜424a opens upward in conjunction with the lower door bodies 421b˜424b. Therefore, the lower door bodies 421b to 424b may be pulled up when working with the whole wide open, and the upper door body when working only on the upper space in the compartments U1 to U4. If 421a-424a is pulled up, lower door body 421b-424b will maintain a position as it is. Thereby, workability | operativity when performing the operation | work only of the upper space in the compartments U1-U4 improves. Note that the door bodies 421 to 424 can be locked independently of each other, thereby ensuring security.

  In the ceiling 31b, a circular suction port 36 is opened right above the partition wall 33 at the substantially center in the left-right direction of the compartments U1 and U3, and this suction port 36 is opened in the right direction through an exhaust duct 37. It communicates with the exhaust port 38. Similarly, a circular suction port 39 is opened directly above the partition wall 33 at the substantially center in the left-right direction of the compartments U2 and U4, and the suction port 39 is an exhaust gas that is opened rightward through an exhaust duct 40. It communicates with the mouth 41. In the state installed in the laboratory, an external exhaust duct (not shown) is connected to the exhaust ports 38 and 41, and communicates with an exhaust port opened to the outside through an exhaust fan. That is, when the exhaust fan operates, the air in the compartments U1 and U3 is sucked through the suction port 36, while the air in the compartments U2 and U4 is sucked through the suction port 39 and discharged to the outside. The

  The flow of air in the compartment at this time will be described with reference to FIG. FIG. 8 shows the air flow when the exhaust fan is operated with the door bodies 421 to 424 completely closed. Even when the door bodies 421 to 424 are completely closed, a small gap is formed below the lower ends of the lower door bodies 421b to 424b. At this time, the upper vent holes 421c to 424c are opened. Therefore, air flows into the respective compartments U1 to U4 from the vent holes 421c to 424c and the lower gap. On the other hand, slits 35a and 35b are formed in the lower and center portions of the back plate 35 in the lateral direction, respectively, and a gap is also formed between the upper end of the upper portion bent to the near side and the ceiling 31b. Yes. Therefore, the air (gas) in each of the compartments U1 to U4 flows into the space between the back plate 35 and the partition wall 33 through these slits and gaps and heads upward, and the exhaust duct 37 passes through the suction port 39 (or 36). , 40 is sucked out. Further, when the tabletop hood facility 30 is installed on the experimental table 10, the vent holes 13 and 14 of the experimental table 10 communicate with the space between the back plate 35 and the partition wall 33. Accordingly, air is sucked up from below the top plate 11 through the vent holes 13 and 14, and as described above, the gas derived from the waste liquid in the waste liquid tank 20 and the chemical in the chemical storage 24 is also discharged to the outdoors.

  When the upper door bodies 421a to 424a are pulled up by the experimenter, the door bodies are opened, but the vent holes 421c to 424c are closed. Thereby, since air flows into the compartments U1 to U4 from the open part, it is possible to prevent an undesired gas generated in the compartments U1 to U4 from flowing back to the experimenter.

  In the tabletop hood facility 30 of this embodiment, the suction ports 36 and 39 are shared by the compartments U1, U3, U2, and U4 arranged in the front and rear, but as is apparent from FIGS. 6 and 8, the partition wall The opening areas of the suction ports 36 and 39 are equally divided by 33, and the conditions of intake from the front and rear compartments U1 (or U2) and U3 (or U4) are uniform. Therefore, it is possible to exhaust well from both compartments without biasing to one compartment. Of course, a suction port may be provided for each compartment, but according to the configuration of the present embodiment, the cost of the facility can be reduced while ensuring the same exhaust capacity.

  When the door bodies 421 to 424 are opened and closed as described above, the sectional area of the air inflow path into the compartments U1 to U4 changes. May fall. Therefore, in the tabletop hood facility 30, devices that maintain the exhaust air velocity at a constant value are attached to the exhaust ducts 37 and 40, respectively. Specifically, an electric open / close damper is provided in the exhaust passage of the exhaust ducts 37 and 40, and the opening of the damper is substantially constant in accordance with the opening / closing operation of the door bodies 421 to 424 (here, 0.5 m / s). As a result, it is possible to prevent the wind speed from falling and the gas from flowing backward from the compartments U1 to U4, and it is also possible to prevent the wind speed from increasing and hindering the work in the compartments U1 to U4. . In addition, since it is possible to prevent the air conditioned in the laboratory from being exhausted more than necessary, it also contributes to saving power consumption for cooling and heating the laboratory.

  Further, as described above, the slits 35a and 35b are formed in the back plate 35, so that variation in the wind speed in the opening surface when the door bodies 421 to 424 are opened is reduced, and the wind speed is locally increased. It can avoid becoming large. Thereby, the obstruction of the work due to the airflow flowing into the compartments U1 to U4 can be further reduced.

  In each compartment U1 to U4 formed by the tabletop hood facility 30, facilities necessary for experiments are provided. That is, the back plate 35 is provided with stands 441 to 444 for fixing instruments such as flasks and test tubes, and the side plate 34 has waste liquid dedicated sinks 431 to 434, AC outlets 481 to 484, an inert gas valve. 491 to 494, vacuum valves 501 to 504, refrigerant circulation pipe outlets 511 to 514, and water taps 521 to 524 are provided. The vacuum valves 501 to 504 are connected to the vacuum pumps 221 to 224 by piping (not shown), and the refrigerant circulation pipe outlets 511 to 514 are connected to the refrigerant circulation devices 231 to 234 by piping (not shown). The inert gas valves 491 to 494 are connected to an inert gas supply pipe (not shown) via an inert gas pressure regulating valve 47 provided in common on the right side wall 31a.

  The waste liquid dedicated sinks 431 to 434 are used for flowing an organic solvent which is no longer necessary for the experiment, and is connected to the waste liquid tank 20 through the waste liquid pipe 53. Since each of the compartments U1 to U4 has independent waste liquid sinks 431 to 434, the experimenter can immediately dispose of the waste liquid that is no longer needed during the operation into the waste liquid dedicated sinks 431 to 434. , Work efficiency is good.

  As described above, in the experimental table 10 in which the tabletop hood facility 30 according to the present embodiment is installed, four experimenters can simultaneously perform experiments with different contents using the four compartments U1 to U4. Since each of the compartments U1 to U4 is completely partitioned and exhausted without interfering with each other, the work can be performed efficiently without interfering with other experimenters. Moreover, the working environment of each experimenter can be maintained well, and it is easy to create an environment that complies with regulations such as the Industrial Safety and Health Law.

  Further, both the experimental table 10 and the tabletop hood facility 30 have a knock-down structure, and are carried into the laboratory in a state of being disassembled into a plurality of members and assembled in the laboratory. Therefore, even when the carrying-in path to the laboratory is narrow, it can be installed relatively easily.

  It should be noted that the above embodiment is merely an example of the present invention, and it is apparent that appropriate modifications and corrections can be made in accordance with the spirit of the present invention.

U1 to U4 ... compartment 10 ... experimental table 11 ... top plate 121 to 124 ... drainage ports 13 and 14 ... vent hole 15 ... ventilation duct 15a ... vent hole 161 to 164 ... drawer unit 17 ... backboard 18 ... AC outlet 19 ... Blow-through section 20 ... Waste liquid tanks 211 to 214 ... Trash bins 221 to 224 ... Vacuum pumps 231 to 234 ... Refrigerant circulation device 24 ... Chemical warehouse 25 ... Fire extinguishers 261 to 264 ... Pump switches 271 to 274 ... Aspirator switches 281 to 284 ... AC outlet 30 ... desk hood facility 31a ... right side wall 31b ... ceiling 32, 33 ... partition wall 34 ... side plate 35 ... back plates 35a, 35b ... slits 36, 39 ... suction ports 37, 40 ... exhaust ducts 38, 41 ... exhaust Mouth 421-424 ... Door body 421a-424a ... Upper door body 421b-424b ... Part door bodies 421c to 424c ... vent holes 431 to 434 ... dedicated waste liquid sinks 441 to 444 ... stand 47 ... inert gas pressure regulating valves 481 to 484 ... AC outlets 491 to 494 ... inert gas valves 501 to 504 ... vacuum valves 511 to 111 514 ... Refrigerant circulation pipe outlets 521 to 524 ... Water faucet 53 ... Waste liquid pipe

Claims (7)

A table hood facility that is installed on a top plate of an experimental table and includes a hood that surrounds the surrounding area and an exhaust means for ventilating the space surrounded by the hood,
An upright partition wall for partitioning the work space on the top plate into a plurality of parts, and an exhaust structure for exhausting air without interfering with each other from the compartments partitioned by the partition wall;
Tabletop food equipment characterized by comprising.   The partition wall is provided in a substantially cross shape when viewed from above, and the top plate of the experimental table is divided into four substantially the same size to form four compartments. The tabletop food facility according to claim 1.   Each of the compartments partitioned by the partition wall includes a door body that is divided into upper and lower parts and includes an upper door body and a lower door body that can be seen through, and the door body includes an upper door body and a lower door body. 3. The structure according to claim 1, wherein the upper door body can be opened upward while being interlocked and can be opened upward while only the lower door body is closed. Tabletop hood equipment.   An experimental bench comprising the tabletop hood facility according to any one of claims 1 to 3, wherein a space for accommodating various equipment necessary for the experiment is provided in a space below the top plate of the experimental bench. An experimental bench with a tabletop hood.   5. The tabletop hood according to claim 4, wherein the tabletop hood facility is provided with a waste liquid dedicated sink for each compartment, and the waste liquid dedicated sink is connected to a waste liquid tank accommodated in a space below the experimental bench by a pipe. Experimental bench with hood equipment.   6. The laboratory bench with a bench hood equipment according to claim 4, wherein the bench hood equipment and the laboratory bench each have a knock-down structure that can be easily assembled.   The laboratory bench with a desktop hood equipment according to any one of claims 4 to 6, wherein a drain port having a lid is formed on the top plate of the laboratory bench.

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