CN113820257A - Light blocker capable of inhibiting external illumination interference - Google Patents
Light blocker capable of inhibiting external illumination interference Download PDFInfo
- Publication number
- CN113820257A CN113820257A CN202111055720.4A CN202111055720A CN113820257A CN 113820257 A CN113820257 A CN 113820257A CN 202111055720 A CN202111055720 A CN 202111055720A CN 113820257 A CN113820257 A CN 113820257A
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- air inlet
- gas
- particle detection
- inlet pipeline
- light
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- 238000005286 illumination Methods 0.000 title claims abstract description 11
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 63
- 230000000903 blocking effect Effects 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 10
- 238000005070 sampling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003189 isokinetic effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
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- G01N15/075—
Abstract
The invention discloses a light blocker capable of inhibiting external illumination interference, which relates to the technical field of detecting gas particle chamber structures and comprises the following components: the gas particle detection device comprises a gas particle detection chamber, wherein the top of the gas particle detection chamber is provided with a gas inlet pipeline, and the gas particle detection chamber is used for carrying out laser detection on gas entering the gas particle detection chamber; the end part of the middle gas path is connected with the gas particle detection chamber, and the middle gas path is used for preventing external light from entering the inside of the gas particle detection chamber; a limiting structure; the light blocker designed by the invention not only prevents external light from entering the chamber for detecting gas particles, but also ensures the stability of airflow, greatly improves the precision and accuracy of gas particle detection, has small integral size and convenient installation, can fully utilize limited space on one hand, and enhances the smoothness of gas on the other hand; the light blocker can be deformed to meet the requirement of the position of the air inlet pipeline of the chamber.
Description
Technical Field
The invention relates to the technical field of gas particle detection chamber structures, in particular to a light blocker capable of inhibiting external illumination interference.
Background
The gas particle detecting chamber is an indispensable structural part in similar instruments such as a dust particle counter and the like, is used for measuring the number and the particle size distribution of dust particles in a single volume in a clean environment, and can be widely applied to production enterprises and scientific research departments such as drug inspection departments, blood centers, epidemic prevention stations, disease control centers, quality supervision departments and the like, electronic industries, pharmaceutical workshops, semiconductors, optical or precision machining, plastics, paint spraying, hospitals, environmental protection departments, inspection departments and the like.
However, a common dust particle counter in the market still has certain defects, firstly, when the dust particle counter of 650nm laser is detected, if the dust particle counter is positioned under direct light and the illuminance reaches above a certain value, the jitter and deviation of the counting can be caused because external light enters a detection cavity through a sampling port, if a mode of processing at the sampling port is used, the motion track of the particles can be indirectly or directly influenced, the final detection signal is influenced, and the power consumption of the whole machine can be increased under the same flow, secondly, the fixed stability of the common dust particle counter is poor, and therefore a light blocker capable of inhibiting the interference of the external light is designed to solve the problems.
Disclosure of Invention
The invention aims to solve the problems in the prior art that:
1) when the dust particle counter of 650nm laser is used for detection, if the dust particle counter is positioned under direct light and the illuminance reaches above a certain value, the external light enters the detection cavity through the sampling port to cause the jitter and deviation of counting, and if the dust particle counter is used in a mode of processing at the sampling port, the movement track of particles can be indirectly or directly influenced, the final detection signal is influenced, and the power consumption of the whole machine can be increased under the same flow.
2) The common problem that the fixed stability of the dust particle counter is poor is solved, and the light blocker capable of inhibiting the interference of external illumination is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a light blocker capable of suppressing interference of external illumination comprises:
the gas particle detection device comprises a gas particle detection chamber, wherein the top of the gas particle detection chamber is provided with a gas inlet pipeline, and the gas particle detection chamber is used for carrying out laser detection on gas entering the gas particle detection chamber;
the end part of the middle gas path is connected with the gas particle detection chamber, and the middle gas path is used for preventing external light from entering the inside of the gas particle detection chamber;
the limiting structure is used for ensuring that the device is installed in place, and the limiting structure is arranged at the top of the air inlet pipeline.
Preferably, the air inlet pipeline is made of SUS316 stainless steel, and the air inlet pipeline is connected with the gas particle detection chamber through an air inlet pipeline joint.
Preferably, the inner surface of the middle air path is black matte, the middle air path with the black matte inner surface forms a light blocking structure, the middle air path is a bent channel, and the middle air path in the form of the bent channel is provided with a plurality of bent positions, and included angles of the bent tangent lines are obtuse angles.
Preferably, interference fit's left side hinders smooth pipe is installed to the inside wall of air inlet pipeline, interference fit's right side hinders smooth pipe is installed to the inside wall of air inlet pipeline, the extrados of left side hinder smooth pipe with the laminating of the inside wall of air inlet pipeline mutually, the extrados of right side hinder smooth pipe with the laminating of the inside wall of air inlet pipeline mutually.
Preferably, the limiting structure is mounted at the end of the left light blocking pipe, and the limiting structure is mounted at the end of the right light blocking pipe.
Preferably, the bottom of the air inlet pipeline joint is connected with the top of the gas particle detection chamber through a screw, the bottom of the air inlet pipeline joint and the top of the gas particle detection chamber are arranged in a sealing mode, the end of the air inlet pipeline joint is attached to the bottom of the air inlet pipeline, and the end of the air inlet pipeline joint and the bottom of the air inlet pipeline are arranged in a sealing mode.
Preferably, the intermediate air passage penetrates through the air inlet passage joint and extends to the top of the inner side wall of the gas particle detection chamber.
Preferably, the outer arc surface of the left light-blocking tube and the outer arc surface of the right light-blocking tube are both black matt, the plane part of the left light-blocking tube is attached to the plane part of the right light-blocking tube, the inner arc surface of the left light-blocking tube and the inner arc surface of the right light-blocking tube which are attached to each other are combined into the middle air passage, and the inner arc surface of the left light-blocking tube and the inner arc surface of the right light-blocking tube are smoothly arranged.
Compared with the prior art, the invention has the beneficial effects that:
the light blocker designed by the invention not only prevents external light from entering the chamber for detecting gas particles, but also ensures the stability of airflow, greatly improves the precision and accuracy of gas particle detection, has small integral size and convenient installation, can fully utilize limited space on one hand, and enhances the smoothness of gas on the other hand; the light blocker can be deformed to meet the requirement of the position of the air inlet pipeline of the chamber.
Drawings
Fig. 1 is a schematic view of a light blocker capable of suppressing interference of external light according to the present invention;
fig. 2 is a schematic view of a right-side light blocking tube structure of a light blocker capable of suppressing interference of external light according to the present invention;
fig. 3 is a schematic view of a left light-blocking tube structure of a light-blocking device capable of suppressing interference of external light according to the present invention;
fig. 4 is a schematic left-view structural diagram of the light blocker according to the present invention, which is capable of suppressing interference of external light;
FIG. 5 is a schematic cross-sectional view of the K-K position of the light blocker according to the present invention for suppressing the interference of external light;
fig. 6 is a schematic structural diagram of a partially enlarged view of a position a shown in fig. 5 of a light blocker capable of suppressing interference of external light according to the present invention.
In the figure: 1. a gas particle detection chamber; 2. an air intake line; 3. a left light blocking pipe; 4. a right light blocking pipe; 5. an air inlet pipeline joint; 6. and an intermediate gas path.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, a light blocker capable of suppressing interference of external light includes:
the gas particle detection device comprises a gas particle detection chamber 1, wherein the top of the gas particle detection chamber 1 is provided with a gas inlet pipeline 2, and the gas particle detection chamber 1 is used for carrying out laser detection on gas entering the gas particle detection chamber 1;
the end part of the middle gas path 6 is connected with the gas particle detection chamber 1, and the middle gas path 6 is used for preventing external light from entering the gas particle detection chamber 1;
and the limiting structure is used for ensuring that the device is installed in place and is arranged at the top of the air inlet pipeline 2.
Wherein, air inlet pipe 2 adopts SUS316 stainless steel to make, and air inlet pipe 2 is connected through air inlet pipe joint 5 with gas particle detection chamber 1.
The inner surface of the middle gas circuit 6 is black matte, the middle gas circuit 6 with the black matte inner surface forms a light blocking structure, the middle gas circuit 6 is a bent channel, the middle gas circuit 6 in the form of the bent channel is provided with a plurality of bent parts, the included angles of the bent tangent lines are obtuse angles, and the included angle value is 120-150 degrees;
set up like this and make the stability of shading effect and air current best to guarantee under the smooth and easy prerequisite of air current, outside light can not penetrate into the cavity directly, can also warp light blocker, make its demand that adapts to cavity air inlet pipeline position.
The inner side wall of the air inlet pipeline 2 is provided with a left light blocking pipe 3 in interference fit, the inner side wall of the air inlet pipeline 2 is provided with a right light blocking pipe 4 in interference fit, the outer arc surface of the left light blocking pipe 3 is attached to the inner side wall of the air inlet pipeline 2, and the outer arc surface of the right light blocking pipe 4 is attached to the inner side wall of the air inlet pipeline 2;
the sealing performance between the left side light blocking pipe 3 and the air inlet pipeline 2 is ensured by tightly attaching the outer arc surface of the right side light blocking pipe 4 and the air inlet pipeline 2.
The limiting structure is arranged at the end part of the left light-blocking tube 3, and the limiting structure is arranged at the end part of the right light-blocking tube 4;
through limit structure's setting, guarantee that left side hinders smooth tube 3 and right side and hinders smooth tube 4 can be accurate install in air inlet pipe 2 and target in place, stainless steel's air inlet pipe 2 can not warp because of the interference fit of left side hinders smooth tube 3 and right side and hinders smooth tube 4 simultaneously, and then guaranteed the stability of admitting air.
The bottom of the air inlet pipeline joint 5 is connected with the top of the gas particle detection chamber 1 through a screw, the bottom of the air inlet pipeline joint 5 and the top of the gas particle detection chamber 1 are arranged in a sealing mode, the end part of the air inlet pipeline joint 5 is attached to the bottom of the air inlet pipeline 2, and the end part of the air inlet pipeline joint 5 and the bottom of the air inlet pipeline 2 are arranged in a sealing mode;
the bottom of the air inlet pipeline joint 5 and the top of the gas particle detection chamber 1 are set to be in a sealing mode, and the end part of the air inlet pipeline joint 5 and the bottom of the air inlet pipeline 2 are set to be in a sealing mode, so that the connection tightness is guaranteed.
Wherein, the middle gas circuit 6 penetrates through the gas inlet pipeline joint 5 and extends to the top of the inner side wall of the gas particle detection chamber 1.
The outer arc surface of the left light-resisting tube 3 and the outer arc surface of the right light-resisting tube 4 are both black matt, the plane part of the left light-resisting tube 3 is jointed with the plane part of the right light-resisting tube 4, the inner arc surface of the left light-resisting tube 3 and the inner arc surface of the right light-resisting tube 4 which are jointed are combined into an intermediate air path 6, and the inner arc surface of the left light-resisting tube 3 and the inner arc surface of the right light-resisting tube 4 are smoothly arranged;
the smooth inner arc surface of the left light-blocking tube 3 and the smooth inner arc surface of the right light-blocking tube 4 ensure that isokinetic gas enters the gas particle detection chamber 1, prevent external light from entering the gas particle detection chamber 1, ensure the stability of airflow and greatly improve the precision and accuracy of gas particle detection.
When the gas particle laser detection device is used, the left light blocking tube 3 and the right light blocking tube 4 are arranged on the inner side wall of the gas inlet pipeline 2, the limiting structures arranged at the end parts of the left light blocking tube 3 and the right light blocking tube 4 ensure that the light blocking tubes are arranged in place, meanwhile, the gas inlet pipeline 2 made of stainless steel cannot deform due to interference fit of the light blocking tubes, then the bottom of the mounted gas inlet pipeline 2 is connected with the top of a gas inlet pipeline joint 5, finally, the bottom of the gas inlet pipeline joint 5 is fixed with the top of the gas particle detection chamber 1 through a screw and further connected with the gas particle detection chamber 1, detected gas enters the gas particle detection chamber 1 through a middle gas path 6 of the left light blocking tube 3 and the right light blocking tube 4 to carry out laser detection on gas particles, and external light is effectively blocked outside the chamber due to the blocking of the light blocking structure of a bent channel, and can be further blocked by the left light blocking tube 3 and the right light blocking tube 4 with black matt outer arc surfaces Block for the device can be suitable for gas particle detection under different light, because it is effectual to restrain external illumination, can improve accuracy and the precision that particle detected in the gas, is worth promoting.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A light blocker capable of suppressing interference of external light, comprising:
the gas particle detection device comprises a gas particle detection chamber (1), wherein the top of the gas particle detection chamber (1) is provided with an air inlet pipeline (2), and the gas particle detection chamber (1) is used for carrying out laser detection on gas entering the gas particle detection chamber;
the end part of the middle gas path (6) is connected with the gas particle detection chamber (1), and the middle gas path (6) is used for preventing external light from entering the gas particle detection chamber (1);
the limiting structure is used for ensuring that the device is installed in place, and the limiting structure is arranged at the top of the air inlet pipeline (2).
2. The light barrier capable of suppressing the interference of external light irradiation as claimed in claim 1, wherein the air inlet pipe (2) is made of SUS316 stainless steel, and the air inlet pipe (2) is connected with the gas particle detection chamber (1) through an air inlet pipe joint (5).
3. The light blocker capable of suppressing external illumination interference according to claim 1, wherein the inner surface of the intermediate air path (6) is black matte, the intermediate air path (6) with the black matte inner surface forms a light blocking structure, the intermediate air path (6) is a curved channel, and the intermediate air path (6) in the form of the curved channel is provided with a plurality of curved portions, and the included angles of the curved tangent lines are obtuse angles.
4. The light blocker capable of inhibiting external illumination interference according to claim 1, wherein a left light blocking pipe (3) in interference fit is installed on an inner side wall of the air inlet pipeline (2), a right light blocking pipe (4) in interference fit is installed on the inner side wall of the air inlet pipeline (2), an outer arc surface of the left light blocking pipe (3) is attached to an inner side wall of the air inlet pipeline (2), and an outer arc surface of the right light blocking pipe (4) is attached to the inner side wall of the air inlet pipeline (2).
5. The light blocker capable of suppressing ambient light interference according to claim 4, wherein the limiting structure is installed at the end of the left light blocking tube (3), and the limiting structure is installed at the end of the right light blocking tube (4).
6. The light blocker capable of inhibiting external illumination interference according to claim 2, wherein the bottom of the air inlet pipeline joint (5) is connected with the top of the gas particle detection chamber (1) through a screw, the bottom of the air inlet pipeline joint (5) and the top of the gas particle detection chamber (1) are arranged in a sealing manner, the end of the air inlet pipeline joint (5) is attached to the bottom of the air inlet pipeline (2), and the end of the air inlet pipeline joint (5) and the bottom of the air inlet pipeline (2) are arranged in a sealing manner.
7. The light blocker capable of suppressing ambient light interference according to claim 4, wherein the intermediate air channel (6) penetrates through the air inlet channel joint (5) and extends to the top of the inner side wall of the gas particle detection chamber (1).
8. The light blocker capable of inhibiting external illumination interference according to claim 4, wherein the outer arc surface of the left light blocking tube (3) and the outer arc surface of the right light blocking tube (4) are both black matt, the plane part of the left light blocking tube (3) is attached to the plane part of the right light blocking tube (4), the inner arc surface of the left light blocking tube (3) and the inner arc surface of the right light blocking tube (4) which are attached to each other are combined into the middle air passage (6), and the inner arc surface of the left light blocking tube (3) and the inner arc surface of the right light blocking tube (4) are smoothly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111055720.4A CN113820257A (en) | 2021-09-09 | 2021-09-09 | Light blocker capable of inhibiting external illumination interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111055720.4A CN113820257A (en) | 2021-09-09 | 2021-09-09 | Light blocker capable of inhibiting external illumination interference |
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| Publication Number | Publication Date |
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| CN113820257A true CN113820257A (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111055720.4A Pending CN113820257A (en) | 2021-09-09 | 2021-09-09 | Light blocker capable of inhibiting external illumination interference |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200367121Y1 (en) * | 2004-07-28 | 2004-11-10 | 주식회사 라이다텍 | Optical particle counter for sub-micron particles |
| CN201780252U (en) * | 2010-07-13 | 2011-03-30 | 苏州工业园区鸿基洁净科技有限公司 | Laser sensor and dust particle counter applying same |
| CN206378418U (en) * | 2016-12-27 | 2017-08-04 | 苏州汉宣检测科技有限公司 | A kind of laser gas detection means |
| CN108680476A (en) * | 2018-06-20 | 2018-10-19 | 苏州百创达环保科技有限公司 | A kind of particle concentration detection device |
| US20180372609A1 (en) * | 2016-02-06 | 2018-12-27 | Wuxi Maitong Scientific Instrument Co., Ltd | Aerosol real time monitor |
| CN211292460U (en) * | 2019-08-23 | 2020-08-18 | 阜新市景澄环保有限公司 | Dust detection device convenient to use |
| CN112014282A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | On-line detection device of direct-reading dust concentration measuring instrument |
| CN112014283A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | Optical path system of direct-reading dust concentration measuring instrument |
-
2021
- 2021-09-09 CN CN202111055720.4A patent/CN113820257A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200367121Y1 (en) * | 2004-07-28 | 2004-11-10 | 주식회사 라이다텍 | Optical particle counter for sub-micron particles |
| CN201780252U (en) * | 2010-07-13 | 2011-03-30 | 苏州工业园区鸿基洁净科技有限公司 | Laser sensor and dust particle counter applying same |
| US20180372609A1 (en) * | 2016-02-06 | 2018-12-27 | Wuxi Maitong Scientific Instrument Co., Ltd | Aerosol real time monitor |
| CN206378418U (en) * | 2016-12-27 | 2017-08-04 | 苏州汉宣检测科技有限公司 | A kind of laser gas detection means |
| CN108680476A (en) * | 2018-06-20 | 2018-10-19 | 苏州百创达环保科技有限公司 | A kind of particle concentration detection device |
| CN211292460U (en) * | 2019-08-23 | 2020-08-18 | 阜新市景澄环保有限公司 | Dust detection device convenient to use |
| CN112014282A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | On-line detection device of direct-reading dust concentration measuring instrument |
| CN112014283A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | Optical path system of direct-reading dust concentration measuring instrument |
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