CN105627699A - Method and device for drying easily-dried wood - Google Patents
Method and device for drying easily-dried wood Download PDFInfo
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- CN105627699A CN105627699A CN201610205103.0A CN201610205103A CN105627699A CN 105627699 A CN105627699 A CN 105627699A CN 201610205103 A CN201610205103 A CN 201610205103A CN 105627699 A CN105627699 A CN 105627699A
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- kiln body
- dry kiln
- drying
- timber
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a method and device for drying easily-dried wood. The method for drying the easily-dried wood comprises the steps of wood accumulating, temperature rise preheating, temperature rise drying, constant-temperature drying, temperature reducing drying and cooling drawing. The device for drying the easily-dried wood comprises a drying kiln body, and a drying kiln body gate is arranged on the drying kiln body. The device for drying the easily-dried wood further comprises a ventilation and dehumidification system, a heating system, a detection and control system and a saturated steam generator. A wood accumulating area is arranged in the drying kiln body. An air inlet capable of being opened or closed is formed in the drying kiln body. The ventilation and dehumidification system, the heating system and the saturated steam generator are all communicated with the wood accumulating area. The detection and control system is used for detecting drying parameters in the drying kiln body and electrically connected with the ventilation and dehumidification system, the heating system, the saturated steam generator and the air inlet. The method and device have the beneficial effects of being high in drying speed, low in energy consumption, small in pollution to environment and the like.
Description
Technical field
The present invention relates to wood processing technique field, particularly relate to drying means and the device of a kind of easy seasoned timber.
Background technology
Drying is the important procedure in wood working, and energy consumption time dry accounts for the 40-70% of wood working total energy consumption, and the quality of dry mass directly decides the height of utilization ratio and the quality of woodwork quality of timber.
At present, conventional steam drying is widely used owing to having the advantages such as technical maturity, loading capacity are big, it it is topmost method for drying wood in prior art, but the method exists, and capacity usage ratio is low, rate of drying is slow, time of drying the defect such as length, and adopt in the method process that timber is dried and need externally to discharge dry waste gas, environment is produced pollution to a certain degree, and in the drying operation of easy dry sawn timber, veneer material, this shortcoming shows particularly outstanding.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, it is provided that a kind of rate of drying is fast, energy consumption is low and environmental pollution is little easy seasoned timber quickly drying method and device.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A drying means for easy seasoned timber, comprises the following steps:
S1, timber are piled up: be accumulated in the timber build-up areas in dry kiln body by easy seasoned timber, and settle temperature sensor and moisture sensor in material is piled;
S2, intensification preheating: close dry kiln body gate and inlet mouth, under ventilation dewetting state, by temperature increase to 40 DEG C-45 DEG C in dry kiln body, and be incubated 0.5h-2h, continue temperature increase to 80 DEG C-85 DEG C in dry kiln body subsequently, and be incubated 0.5h-2h;
S3, intensification drying: by temperature increase to 105 DEG C-110 DEG C in dry kiln body, and it is incubated 0.5h-2h, in insulating process, lead to into high-pressure saturated water vapor in dry kiln body, remaining air in dry kiln body is replaced with water vapor, after the air content in dry kiln body is lower than 5%, stop leading to into high-pressure saturated water vapor;
S4, freeze-day with constant temperature: by temperature increase in dry kiln body to setting drying temperature T, wherein, 110 DEG C��T��160 DEG C, maintain temperature in dry kiln body and setting drying temperature T, till easily seasoned timber water ratio is reduced to 1%-2% higher than the target water ratio of setting;
S5, cooling and drying: stop promoting temperature in dry kiln body, keep ventilation, stopping row wet, open the inlet mouth of dry kiln body, make the slow naturally cooling of temperature in dry kiln body;
S6, cool out kiln: after easy seasoned timber core layer temperature is reduced to and is no more than 20 DEG C higher than external temperature, open dry kiln body gate, taken out by dried easy seasoned timber.
Further improvement as technique scheme:
In described step S1, according to LY/T1068-2012 standard, easy seasoned timber being carried out accumulation process, the height of material heap is 1.0m-3.0m, and the width of material heap is 1.0m-2.5m, and the thickness of parting bead is 20mm-30mm, and the width of parting bead is 30mm-40mm.
The drying installation of a kind of easy seasoned timber, comprise dry kiln body, described dry kiln body is provided with dry kiln body gate, the drying installation of described easy seasoned timber also comprise ventilation dewetting system, heating system, detecting and controlling system and saturated steam generator, it is provided with timber build-up areas in described dry kiln body, described dry kiln body is provided with the inlet mouth can opened or close, described ventilation dewetting system, heating system is all connected with described timber build-up areas with saturated steam generator, described detecting and controlling system for the drying parameter that detects in described dry kiln body and respectively with described ventilation dewetting system, heating system, saturated steam generator and inlet mouth electrical connection.
Further improvement as technique scheme:
Described ventilation dewetting system comprises the wet holes of propeller fan, dehumidifying pipelines and two rows that can open or close, and two wet holes of described row are separately positioned on the both sides, front and back of described propeller fan and are all connected with described dehumidifying pipelines.
Described heating system comprises scatterer, recycle pump, oil guide pipe and heat-conducting oil heating device, described scatterer is installed in described dry kiln body and is connected with described heat-conducting oil heating device by described oil guide pipe, described recycle pump is installed on described oil guide pipe, and it is external that described recycle pump and heat-conducting oil heating device are all installed in described dry kiln.
It is external and be connected with described dry kiln body by pipeline that described saturated steam generator is installed in described dry kiln.
Described detecting and controlling system is for the medium temperature that detects in described dry kiln body and the air content in medium, the easily water ratio of seasoned timber and the temperature of timber core layer.
Compared with prior art, it is an advantage of the current invention that:
(1) drying means of the easy seasoned timber of the present invention, compared with conventional steam drying of the prior art, rate of drying significantly improves, and energy consumption also has obvious reduction, in drying process, dry kiln body with extraneous without gaseous interchange, can not discharging waste gas, decrease the pollution to environment, in addition, drying process can realize the modification to timber simultaneously, de-except the resin in timber, it is to increase the dimensional stability of timber.
(2) drying installation of the easy seasoned timber of the present invention, compact construction, it is possible to for realizing the drying means of the easy seasoned timber of the present invention, thus improve the drying efficiency of easy seasoned timber, reduces energy consumption for drying, simultaneously that the pollution of environment is little.
Accompanying drawing explanation
Fig. 1 is the front view of the easy seasoned timber drying installation of the present invention.
Fig. 2 is the vertical view of the easy seasoned timber drying installation of the present invention.
Fig. 3 is the side-view of the easy seasoned timber drying installation of the present invention.
In figure, each label represents:
1, dry kiln body; 11, timber build-up areas; 12, inlet mouth; 2, ventilation dewetting system; 21, propeller fan; 22, the wet hole of row; 23, dehumidifying pipelines; 24, draining pond; 3, heating system; 31, scatterer; 32, recycle pump; 33, oil guide pipe; 34, heat-conducting oil heating device; 5, saturated steam generator.
Embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
Embodiment 1
A drying means for easy seasoned timber, specifically comprises the following steps:
(1) timber is piled up: be accumulated in the timber build-up areas in dry kiln body by wet Pinus massoniana Lamb sawn timber;
In the present embodiment, being piled up by wet Pinus massoniana Lamb sawn timber according to LY/T1068-2012 standard, the thickness of sawn timber is 25mm, and length is 2.0m, and first water ratio is about 75%; Material stack height is 1.5m, and material heap width is 1.5m; Thickness and the width of parting bead are respectively 25mm, 35mm, and the length of parting bead is 1.6m; And in material is piled, settled temperature and moisture sensor according to standard-required;
(2) intensification preheating: close dry kiln body gate and inlet mouth, under ventilation dewetting state, by kiln temperature fast lifting to 42 DEG C, and be incubated 1.0 hours, fully heat is saturating to make wet Pinus massoniana Lamb saw; After insulation terminates, continuing kiln temperature is elevated to 80 DEG C, and be incubated 1.0 hours, make wet Pinus massoniana Lamb saw fully thoroughly hot, in temperature-rise period, heat-up rate controls at 4 DEG C/h;
(3) heat up drying: by temperature increase to 110 DEG C in dry kiln body, and it is incubated 1 hour, insulating process lead to into high-pressure saturated water vapor in dry kiln body, remaining air in dry kiln body is replaced with water vapor, after the air content in dry kiln body is lower than 5%, stop leading to into high-pressure saturated water vapor;
(4) freeze-day with constant temperature: by temperature increase in dry kiln body to setting drying temperature 130 DEG C, in maintenance dry kiln body, temperature is at 130 DEG C, until easily seasoned timber water ratio is reduced to about 10%;
(5) cooling and drying: stop promoting temperature in dry kiln body, keeps ventilation, stopping row wet, opens the inlet mouth of dry kiln body, make the slow naturally cooling of temperature in dry kiln body;
(6) cool out kiln: when timber core layer temperature is reduced to 35 DEG C, open wicket, and dried Pinus massoniana Lamb sawn timber is gone out kiln.
Draw by experiment, in the present embodiment, being 75% be dried to 9% by Pinus massoniana Lamb sawn timber from water ratio, time of drying is 2.5 days, less than the half of conventional drying time, power consumption reduces by 55%, dry mass is better, and Pinus massoniana Lamb sawn timber reaches degreasing two grades of material standards, and drying process is closed cycle, without dry waste gas discharge, environmental pollution is little.
Embodiment 2
A drying means for easy seasoned timber, specifically comprises the following steps:
(1) timber is piled up: be accumulated in the timber build-up areas in dry kiln body by wet board using poplar board;
In the present embodiment, being piled up by wet board using poplar board according to LY/T1068-2012 standard, the thickness of board using poplar board is 1.2mm, and width is 1.22m, length is 2.44m, average moisture content is 92%, in banking process, first at thickness direction, 15 layers of veneer is first stacked into the thick veneer layer of 18mm, place one layer of parting bead again, replacing successively, material stack height is 1.2m, and material heap width is 1.22m; Thickness and the width of parting bead are respectively 20mm, 30mm, and the length of parting bead is 1.4m. And in veneer material is piled, settled temperature and moisture sensor according to standard-required.
(2) intensification preheating: close dry kiln body gate and inlet mouth, under ventilation dewetting state, by kiln temperature fast lifting to 45 DEG C, and be incubated 0.5 hour, make wet board using poplar board fully hot; After insulation terminates, continuing kiln temperature is elevated to 85 DEG C, and be incubated 0.5 hour, make wet board using poplar board fully hot, in temperature-rise period, heat-up rate controls at 5 DEG C/h.
(3) heat up drying: by temperature increase to 110 DEG C in dry kiln body, and it is incubated 0.5 hour, insulating process lead to into high-pressure saturated water vapor in dry kiln body, remaining air in dry kiln body is replaced with water vapor, after the air content in dry kiln body is lower than 5%, stop leading to into high-pressure saturated water vapor;
(4) freeze-day with constant temperature: by temperature increase in dry kiln body to setting drying temperature 150 DEG C, in maintenance dry kiln body, temperature is at 130 DEG C, until easily seasoned timber water ratio is reduced to about 8%;
(5) cooling and drying: stop promoting temperature in dry kiln body, keeps ventilation, stopping row wet, opens the inlet mouth of dry kiln body, make the slow naturally cooling of temperature in dry kiln body;
(6) cool out kiln: when timber core layer temperature is reduced to 40 DEG C, open wicket, and dried wet board using poplar board is gone out kiln.
In the present embodiment, it is 92% be dried to 8% by board using poplar board from water ratio, it is only 15 hours time of drying, less than the half of conventional drying time, power consumption reduces by 62%, and dry mass is better, drying process is closed cycle, and without dry waste gas discharge, environmental pollution is little.
Fig. 1 to Fig. 3 shows a kind of embodiment of the present invention's easy seasoned timber drying installation, this easy seasoned timber drying installation can be used to realize the easy seasoned timber drying means of the present invention, this device comprises dry kiln body 1, dry kiln body 1 is provided with dry kiln body gate, the drying installation of easy seasoned timber also comprise ventilation dewetting system 2, heating system 3, detecting and controlling system and saturated steam generator 5, timber build-up areas 11 it is provided with in dry kiln body 1, dry kiln body 1 is provided with the inlet mouth 12 can opened or close, ventilation dewetting system 2, heating system 3 is all connected with timber build-up areas 11 with saturated steam generator 5, detecting and controlling system for the drying parameter that detects in dry kiln body 1 and respectively with ventilation dewetting system 2, heating system 3, saturated steam generator 5 and inlet mouth 12 are electrically connected, ventilation dewetting system 2 is wet for ventilation and the row realized in dry kiln body 1, the temperature of heating system 3 for promoting in dry kiln body 1, vapour generator 5 for leading to into high-pressure saturated water vapor in insulating process in dry kiln body, detecting and controlling system can detect the medium temperature in dry kiln body 1 and the air content in medium, the water ratio of easy seasoned timber and the temperature of timber core layer, and control inlet mouth 12, ventilation dewetting system 2, the opening and closing of heating system 3 and saturated steam generator 5, this apparatus structure is simple, compact, may be used for realizing the drying means of the easy seasoned timber of the present invention, thus improve the drying efficiency of easy seasoned timber, reduce energy consumption for drying, simultaneously that the pollution of environment is little.
In the present embodiment, ventilation dewetting system 2 comprises propeller fan 21, dehumidifying pipelines 23 and two wet holes 22 of the row that can open or close, two wet holes 22 of row are separately positioned on the both sides, front and back of propeller fan 21 and are all connected with dehumidifying pipelines 23, in intensification warm, open propeller fan 21, open the wet hole 22 of row of propeller fan 21 positive pressure side, close the wet hole 22 of row of propeller fan 21 suction side, namely the ventilation dewetting state of dry kiln body 1 is achieved, in cooling and drying process, propeller fan 21 is kept to open, close the row wet 22 of propeller fan 21 positive pressure side, dehumidification tube road 23 is connected with draining pond 24.
In the present embodiment, heating system 3 comprises scatterer 31, recycle pump 32, oil guide pipe 33 and heat-conducting oil heating device 34, scatterer 31 is installed in dry kiln body 1 and is connected with heat-conducting oil heating device 34 by oil guide pipe 33, recycle pump 32 is installed on oil guide pipe 33, recycle pump 32 and heat-conducting oil heating device 34 are all installed in outside dry kiln body 1, by scatterer 31, the heat of thermal oil is distributed to timber build-up areas 11, thus promotes the temperature in dry kiln body 1.
In the present embodiment, saturated steam generator 5 is installed in dry kiln body 1 and outward and is connected with dry kiln body 1 by pipeline.
In the present embodiment, detecting and controlling system is for the air content in the medium temperature that detects in dry kiln body 1 and medium, the easily water ratio of seasoned timber and the temperature of timber core layer, detecting and controlling system is according to the opening and closing of the program of setting with the above-mentioned state modulator inlet mouth 12, ventilation dewetting system 2, heating system 3 and the saturated steam generator 5 that detect, it is achieved the drying means of the easy seasoned timber of the present invention.
Although the present invention discloses as above with better embodiment, but and it is not used to limit the present invention. Any those of ordinary skill in the art, when not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible variations and modification, or be revised as the equivalent embodiment of equivalent variations. Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (7)
1. the drying means of an easy seasoned timber, it is characterised in that, comprise the following steps:
S1, timber are piled up: be accumulated in the timber build-up areas in dry kiln body by easy seasoned timber, and settle temperature sensor and moisture sensor in material is piled;
S2, intensification preheating: close dry kiln body gate and inlet mouth, under ventilation dewetting state, by temperature increase to 40 DEG C-45 DEG C in dry kiln body, and be incubated 0.5h-2h, continue temperature increase to 80 DEG C-85 DEG C in dry kiln body subsequently, and be incubated 0.5h-2h;
S3, intensification drying: by temperature increase to 105 DEG C-110 DEG C in dry kiln body, and it is incubated 0.5-2 hour, in insulating process, lead to into high-pressure saturated water vapor in dry kiln body, remaining air in dry kiln body is replaced with water vapor, after the air content in dry kiln body is lower than 5%, stop leading to into high-pressure saturated water vapor;
S4, freeze-day with constant temperature: by temperature increase in dry kiln body to setting drying temperature T, wherein, 110 DEG C��T��160 DEG C, maintain temperature in dry kiln body and setting drying temperature T, till easily seasoned timber water ratio is reduced to 1%-2% higher than the target water ratio of setting;
S5, cooling and drying: stop promoting temperature in dry kiln body, keep ventilation, stopping row wet, open the inlet mouth of dry kiln body, make the slow naturally cooling of temperature in dry kiln body;
S6, cool out kiln: after easy seasoned timber core layer temperature is reduced to and is no more than 20 DEG C higher than external temperature, open dry kiln body gate, taken out by dried easy seasoned timber.
2. the drying means of easy seasoned timber according to claim 1, it is characterized in that: in described step S1, according to LY/T1068-2012 standard, easy seasoned timber is carried out accumulation process, the height of material heap is 1.0m-3.0m, the width of material heap is 1.0m-2.5m, the thickness of parting bead is 20mm-30mm, and the width of parting bead is 30mm-40mm.
3. the drying installation of an easy seasoned timber, comprise dry kiln body (1), described dry kiln body (1) is provided with dry kiln body gate, it is characterized in that: the drying installation of described easy seasoned timber also comprise ventilation dewetting system (2), heating system (3), detecting and controlling system and saturated steam generator (5), it is provided with timber build-up areas (11) in described dry kiln body (1), described dry kiln body (1) is provided with the inlet mouth (12) can opened or close, described ventilation dewetting system (2), heating system (3) is all connected with described timber build-up areas (11) with saturated steam generator (5), described detecting and controlling system for the drying parameter that detects in described dry kiln body (1) and respectively with described ventilation dewetting system (2), heating system (3), saturated steam generator (5) and inlet mouth (12) electrical connection.
4. the drying installation of easy seasoned timber according to claim 3, it is characterized in that: described ventilation dewetting system (2) comprises the wet holes (22) of propeller fan (21), dehumidifying pipelines (23) and two rows that can open or close, two wet holes (22) of described row are separately positioned on the both sides, front and back of described propeller fan (21) and are all connected with described dehumidifying pipelines (23).
5. the drying installation of easy seasoned timber according to claim 3 or 4, it is characterized in that: described heating system (3) comprises scatterer (31), recycle pump (32), oil guide pipe (33) and heat-conducting oil heating device (34), described scatterer (31) is installed in described dry kiln body (1) and is connected with described heat-conducting oil heating device (34) by described oil guide pipe (33), described recycle pump (32) is installed on described oil guide pipe (33), and described recycle pump (32) and heat-conducting oil heating device (34) are all installed in described dry kiln body (1) outward.
6. the drying installation of easy seasoned timber according to claim 3 or 4, it is characterised in that: described saturated steam generator (5) is installed in described dry kiln body (1) and outward and is connected with described dry kiln body (1) by pipeline.
7. the drying installation of easy seasoned timber according to claim 3 or 4, it is characterised in that: described detecting and controlling system is for the medium temperature that detects in described dry kiln body (1) and air content, the easily water ratio of seasoned timber and the temperature of timber core layer in medium.
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Cited By (11)
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| CN104378926A (en) * | 2013-08-12 | 2015-02-25 | 上海斐讯数据通信技术有限公司 | PoP chip integrating jig and application method thereof |
| CN106003342A (en) * | 2016-06-08 | 2016-10-12 | 王宾 | Solid wood door raw material drying and processing process |
| CN107178993A (en) * | 2017-04-28 | 2017-09-19 | 中南林业科技大学 | Minute-pressure superheated steam Wood drying apparatus and application method |
| CN107192224A (en) * | 2017-04-28 | 2017-09-22 | 中南林业科技大学 | The energy-efficient drying device of minute-pressure self arrangement timber and drying means |
| CN107621133A (en) * | 2017-09-20 | 2018-01-23 | 中南林业科技大学 | A kind of linden method for drying wood |
| CN108844344A (en) * | 2018-08-30 | 2018-11-20 | 桂林电子科技大学 | Rare earth dry kiln |
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| CN106003342A (en) * | 2016-06-08 | 2016-10-12 | 王宾 | Solid wood door raw material drying and processing process |
| CN107178993A (en) * | 2017-04-28 | 2017-09-19 | 中南林业科技大学 | Minute-pressure superheated steam Wood drying apparatus and application method |
| CN107192224A (en) * | 2017-04-28 | 2017-09-22 | 中南林业科技大学 | The energy-efficient drying device of minute-pressure self arrangement timber and drying means |
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| CN109489357A (en) * | 2018-10-30 | 2019-03-19 | 中南林业科技大学 | Joint for timber is mostly used dry kiln and its application method |
| CN111438780A (en) * | 2020-04-20 | 2020-07-24 | 中南林业科技大学 | Wood superheated steam drying and heat treatment integrated device and use method |
| CN113701463A (en) * | 2021-08-23 | 2021-11-26 | 浙江世友木业有限公司 | Combined drying method and drying device thereof |
| WO2023023896A1 (en) * | 2021-08-23 | 2023-03-02 | 浙江世友木业有限公司 | Combined drying method and drying device thereof |
| CN117743772A (en) * | 2023-12-29 | 2024-03-22 | 维达纸业(浙江)有限公司 | Toilet paper drying parameter optimization method and system based on artificial intelligent model |
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