CN110196282A - A kind of centrifugally glass-wool sound absorption qualities detection device - Google Patents
A kind of centrifugally glass-wool sound absorption qualities detection device Download PDFInfo
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- CN110196282A CN110196282A CN201910416060.4A CN201910416060A CN110196282A CN 110196282 A CN110196282 A CN 110196282A CN 201910416060 A CN201910416060 A CN 201910416060A CN 110196282 A CN110196282 A CN 110196282A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
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- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to centrifugally glass-wool technical fields, and disclose a kind of centrifugally glass-wool sound absorption qualities detection device, including platform, connecting rod is fixedly connected on the right side of the table top, the outer surface of the connecting rod is fixedly installed with casing, strut is fixedly connected on the left of described sleeve pipe, the left end of the strut is fixedly connected with detection case, the inside of the detection case is fixedly installed with a decibel detector, sliding rail is fixedly installed on the left of the table top, the left and right sides inside the sliding rail is connected with sliding block, slide bar is fixedly connected at the top of two sliding blocks, the top of two slide bars is fixedly connected by work box, the right side of the work box and the left side of detection case are fixedly installed with rubber ring, the inside of the work box is fixedly installed with loudspeaker.The centrifugally glass-wool sound absorption qualities detection device, facilitates test sound absorption qualities, and test effect is accurate.
Description
Technical field
The present invention relates to centrifugally glass-wool technical field, specially a kind of centrifugally glass-wool sound absorption qualities detection device.
Background technique
Centrifugally glass-wool is that glass in a molten state is carried out fibrosis spraying thermosetting property with centrifugal injection method technique
Filamentary material made of resin is handled using heat cure deep processing, can be made into the series of products to serve many purposes, is centrifuged glass
Glass cotton internal fiber is fluffy staggeredly, there are a large amount of small holes, is typical porous sound-absorbing material, has good sound absorption
Characteristic.
It is a kind of for testing in the device of vehicle glass sound insulation value according to 107219301 A of Chinese patent CN, by fixed
To speaker, signal generator and decibel instrument, it connect signal generator with directional sound and voice signal can be exported to orientation
Speaker, directional sound are installed on the middle position of the side of vehicle glass to be tested, and decibel instrument is installed on vehicle glass to be tested
The other side middle position, the detecting head of decibel instrument navigate to positioning speaker sound field center line on, so as to accurate
Test out sound transmission loss, the not limitation of tested person scene is not limited by the specification of vehicle glass, meets the portable test of multi items
Demand, improve the test of sound insulation value, this mode is in test acoustic material, since sound wave can occur to rebound and expand
It dissipates, is easy to cause the data performance inaccuracy of test, influences the data structure of sound absorption qualities, so propose a kind of centrifugally glass-wool
Sound absorption qualities detection device is upper to solve the problems, such as.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of centrifugally glass-wool sound absorption qualities detection device, the sides of having
Just sound absorption qualities are tested, and the advantages that test effect is accurate, solved in test acoustic material, since sound wave can rebound
And diffusion, the problem of being easy to cause the data performance inaccuracy of test, influence the data structure of sound absorption qualities.
(2) technical solution
Facilitate test sound absorption qualities, and the accurate purpose of test effect for realization is above-mentioned, the present invention provides following technical side
Case: a kind of centrifugally glass-wool sound absorption qualities detection device, including platform are fixedly connected with connection on the right side of the table top
Bar, the outer surface of the connecting rod are fixedly installed with casing, and strut, a left side for the strut are fixedly connected on the left of described sleeve pipe
End is fixedly connected with detection case, and the inside of the detection case is fixedly installed with a decibel detector, and the left side of the table top is solid
Dingan County is equipped with sliding rail, and the left and right sides inside the sliding rail is connected with sliding block, and the top of two sliding blocks is fixed
It is connected with slide bar, the top of two slide bars is fixedly connected by work box, the right side of the work box and detection case
Left side is fixedly installed with rubber ring, and the inside of the work box is fixedly installed with loudspeaker, the top of the platform and is located at
Electric pushrod is fixedly installed on the left of sliding rail, the right side of the electric pushrod is fixedly connected with slide bar, the top of the detection case
Portion is fixedly connected with support rod, and support plate is fixedly connected on the left of the support rod, and the inside of the support plate offers cunning
Hole, the left and right sides inside the slide opening are connected with motion bar, and the left side at the top of the support plate is fixedly connected with company
Fishplate bar is connected with threaded rod on the right side of the connecting plate, and the left and right sides of the screw thread rod outer surface is connected with
Screwed pipe, the bottom end of two screwed pipes are fixedly connected with the top of two motion bars, the bottom end of two motion bars
It is fixedly connected to clamping plate, the front and rear sides of two motion bars are fixedly connected to mobile bar, the top of the support plate
And the front and rear sides for being located at slide opening offer sliding slot, the inside of two sliding slots is connected with movable block, four institutes
The bottom end for stating mobile bar is fixedly connected with movable block, and the front and rear sides of the mesa base are fixedly connected to fixed plate, and two
The inside of a fixed plate is connected with inserted link, and the front of the front inserted link is fixedly connected with pulling plate, the pulling plate
It is fixedly connected between fixed plate by spring, the opposite side of two inserted links is connected by the activity of centrifugally glass-wool ontology
It connects, the top of the centrifugally glass-wool ontology is run through and extended between two clamping plates, and the left and right sides of the mesa base is equal
It is fixedly installed with pedestal.
Preferably, the pedestal is made of bottom bar and bottom plate, and the bottom of the bottom plate is fixedly installed with non-slip mat, the bottom
The top of plate and the connection angle of bottom bar are 90 degree.
Preferably, two opposite sides of the clamping plate are fixedly installed with cushion, the opposite side of two cushions
Offer anti-skid chequer.
Preferably, the bottom of the electric pushrod is fixedly installed with fixing seat, the bottom of the fixing seat and the top of platform
Portion is fixedly mounted.
Preferably, the quantity of described sleeve pipe is two, and is evenly distributed on the two sides up and down of connecting rod, and the left side of casing
Connection angle with strut is 90 degree.
Preferably, the mobile bar is L-shaped, and the connection angle of the mobile bar and movable block is 90 degree.
Preferably, the quantity of the sliding slot is two, and two sliding slots and slide opening are in parallel shape, the sliding slot and cunning
The length in hole is identical.
Preferably, the front of the platform is fixedly installed with display, and the display is electrically connected with decibel detector.
Preferably, the width of the centrifugally glass-wool ontology is greater than the width of detection case, the centrifugally glass-wool ontology
Outer surface is bonded with rubber ring.
Preferably, the right end of the threaded rod is fixedly installed with handle, and the outer surface of the handle offers anti-skid chequer, institute
The axle center for stating the axle center of handle, the axle center of threaded rod and screwed pipe is respectively positioned on same straight line.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of centrifugally glass-wool sound absorption qualities detection device, having following has
Beneficial effect:
1, the centrifugally glass-wool sound absorption qualities detection device rotates spiral shell by being threadedly coupled by threaded rod with screwed pipe
Rasp bar drives two clamping plate relative movements, clamps clamping plate to centrifugally glass-wool ontology, plays and facilitate fixed effect,
It is made a sound by the loudspeaker in work box, the outer surface of centrifugally glass-wool ontology is pasted with detection case and work box respectively
It closes, and detection case and the opposite side of work box are fixedly connected to rubber ring, so that loudspeaker, which makes a sound, effectively to be prevented
Only sound leaks out, and causes the phenomenon of test result inaccuracy, passes through centrifugally glass-wool ontology by sound, makes the decibel inspection on right side
The decibel detector decibel of the decibel and left side of surveying instrument detection compares, and facilitates test sound absorption qualities to reach, and surveys
Try the accurate purpose of effect.
2, the centrifugally glass-wool sound absorption qualities detection device, is fixedly connected by the right end of electric pushrod with slide bar, and sliding
The sliding block of bar connection moves in sliding rail, so that electric pushrod is driven work box mobile, and work box is when moving, sliding block exists
It is moved in sliding rail, plays the role of increasing device stability, drive motion bar mobile by screwed pipe, motion bar drives movement
Bar connection movable block moved in sliding slot, keep motion bar mobile it is more stable, by being fixedly connected with spring in fixed plate,
By spring reset, centrifugally glass-wool ontology is fixed in inserted link at one's leisure, plays the role of being easy for installation and removal.
Detailed description of the invention
Fig. 1 is a kind of centrifugally glass-wool sound absorption qualities structure of the detecting device schematic diagram proposed by the present invention；
Fig. 2 is fixed plate and inserted link connection structure in a kind of centrifugally glass-wool sound absorption qualities detection device proposed by the present invention
Left view；
Fig. 3 is the connection knot of sliding slot and movable block in a kind of centrifugally glass-wool sound absorption qualities detection device proposed by the present invention
Structure top view；
Fig. 4 is partial structurtes amplification in the portion A in a kind of centrifugally glass-wool sound absorption qualities detection device Fig. 1 proposed by the present invention
Figure；
Fig. 5 is a kind of centrifugally glass-wool sound absorption qualities structure of the detecting device front view proposed by the present invention.
In figure: 1 platform, 2 connecting rods, 3 casings, 4 struts, 5 detection cases, 6 decibels of detectors, 7 sliding rails, 8 sliding blocks, 9 slide bars,
10 work boxs, 11 loudspeakers, 12 electric pushrods, 13 support rods, 14 support plates, 15 slide openings, 16 motion bars, 17 connecting plates, 18 spiral shells
Rasp bar, 19 screwed pipes, 20 clamping plates, 21 mobile bars, 22 sliding slots, 23 movable blocks, 24 fixed plates, 25 inserted links, 26 pulling plates, 27 springs,
28 centrifugally glass-wool ontologies, 29 pedestals, 30 rubber rings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-5, a kind of centrifugally glass-wool sound absorption qualities detection device, including platform 1 are please referred to, the front of platform 1 is fixed
Display is installed, display is electrically connected with decibel detector 6, and the right side at 1 top of platform is fixedly connected with connecting rod 2, is connected
The outer surface of bar 2 is fixedly installed with casing 3, and the quantity of casing 3 is two, and is evenly distributed on the two sides up and down of connecting rod 2, and
The left side of casing 3 and the connection angle of strut 4 are 90 degree, and the left side of casing 3 is fixedly connected with strut 4, and the left end of strut 4 is solid
Surely it is connected with detection case 5, the inside of detection case 5 is fixedly installed with decibel detector 6, and the left side at 1 top of platform is fixedly installed with
Sliding rail 7, the left and right sides inside sliding rail 7 are connected with sliding block 8, and the top of two sliding blocks 8 is fixedly connected to slide bar 9,
The top of two slide bars 9 passes through work box 10 and is fixedly connected, and the right side of work box 10 is fixedly mounted with the left side of detection case 5
There is a rubber ring 30, the inside of work box 10 is fixedly installed with loudspeaker 11, the top of the platform 1 and left side for being located at sliding rail 7 is fixed
Electric pushrod 12 is installed, the bottom of electric pushrod 12 is fixedly installed with fixing seat, and the bottom of fixing seat and the top of platform 1 are solid
Dingan County's dress, the right side of electric pushrod 12 are fixedly connected with slide bar 9, and the top of detection case 5 is fixedly connected with support rod 13, support rod
13 left side is fixedly connected with support plate 14, and the inside of support plate 14 offers slide opening 15, and the left and right sides inside slide opening 15 is equal
It is connected with motion bar 16, the left side at 14 top of support plate is fixedly connected with connecting plate 17, and the right side activity of connecting plate 17 connects
It is connected to threaded rod 18, the right end of threaded rod 18 is fixedly installed with handle, and the outer surface of handle offers anti-skid chequer, the axis of handle
The axle center of the heart, the axle center of threaded rod 18 and screwed pipe 19 is respectively positioned on same straight line, and the left and right sides of 18 outer surface of threaded rod is equal
It is connected with screwed pipe 19, the bottom end of two screwed pipes 19 is fixedly connected with the top of two motion bars 16, two activities
The bottom end of bar 16 is fixedly connected to clamping plate 20, and two opposite sides of clamping plate 20 are fixedly installed with cushion, two cushion phases
Pair side offer anti-skid chequer, the front and rear sides of two motion bars 16 are fixedly connected to mobile bar 21, and mobile bar 21 is in L
The connection angle of shape, mobile bar 21 and movable block 23 is 90 degree, the top of support plate 14 and the front and rear sides for being located at slide opening 15
Sliding slot 22 is offered, the quantity of sliding slot 22 is two, and two sliding slots 22 and slide opening 15 are in parallel shape, sliding slot 22 and slide opening 15
Length it is identical, the inside of two sliding slots 22 is connected with movable block 23, and the bottom end of four mobile bars 21 is and movable block
23 are fixedly connected, and the front and rear sides of 1 bottom of platform are fixedly connected to fixed plate 24, and the activity of the inside of two fixed plates 24 is even
It is connected to inserted link 25, the front of front inserted link 25 is fixedly connected with pulling plate 26, solid by spring 27 between pulling plate 26 and fixed plate 24
Fixed connection, the opposite side of two inserted links 25 are flexibly connected by centrifugally glass-wool ontology 28, the width of centrifugally glass-wool ontology 28
Degree is greater than the width of detection case 5, and the outer surface of centrifugally glass-wool ontology 28 is bonded with rubber ring 30, centrifugally glass-wool ontology 28
Top is run through and is extended between two clamping plates 20, and the left and right sides of 1 bottom of platform is fixedly installed with pedestal 29, pedestal 29 by
Bottom bar and bottom plate composition, the bottom of bottom plate are fixedly installed with non-slip mat, and the top of bottom plate and the connection angle of bottom bar are 90 degree.
In conclusion the centrifugally glass-wool sound absorption qualities detection device, by passing through threaded rod 18 and 19 screw thread of screwed pipe
Connection, rotation threaded rod 18 drive two clamping plates 20 to relatively move, clamp clamping plate 20 to centrifugally glass-wool ontology 28, rise
It to fixed effect is facilitated, is made a sound by the loudspeaker 11 in work box 10, by the appearance of centrifugally glass-wool ontology 28
Face is bonded with detection case 5 and work box 10 respectively, and detection case 5 and the opposite side of work box 10 are fixedly connected to rubber ring
30, it effectively can prevent sound from leaking out so that loudspeaker 11 makes a sound, cause the phenomenon of test result inaccuracy, pass through sound
Across centrifugally glass-wool ontology 28,6 decibels of decibel detector progress of the decibel and left side for detecting the decibel detector 6 on right side
Comparison, facilitates test sound absorption qualities to reach, and the accurate purpose of test effect.
Also, it is fixedly connected by the right end of electric pushrod 12 with slide bar 9, and the sliding block 8 that slide bar 9 connects is in sliding rail 7
It is mobile, so that electric pushrod 12 is driven work box 10 mobile, and work box 10 is when moving, sliding block 8 moves in sliding rail 7,
Play the role of increasing device stability, drives motion bar 16 mobile by screwed pipe 19, motion bar 16 drives mobile bar 21
The movable block 23 of connection moves in sliding slot 22, keeps motion bar 16 more stablely mobile, by being fixedly connected in fixed plate 24
There is spring 27, resetted by spring 27, centrifugally glass-wool ontology 28 is fixed in inserted link 25 at one's leisure, plays and facilitates installation
With the effect of disassembly.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of centrifugally glass-wool sound absorption qualities detection device, including platform (1), it is characterised in that: at the top of the platform (1)
Right side is fixedly connected with connecting rod (2), and the outer surface of the connecting rod (2) is fixedly installed with casing (3), described sleeve pipe (3)
Left side is fixedly connected with strut (4), and the left end of the strut (4) is fixedly connected with detection case (5), the detection case (5) it is interior
Portion is fixedly installed with a decibel detector (6), and the left side at the top of the platform (1) is fixedly installed with sliding rail (7), the sliding rail (7)
The internal left and right sides is connected with sliding block (8), is fixedly connected to slide bar (9) at the top of two sliding blocks (8), two
The top of a slide bar (9) passes through work box (10) and is fixedly connected, right side and detection case (5) of the work box (10)
Left side is fixedly installed with rubber ring (30), and the inside of the work box (10) is fixedly installed with loudspeaker (11), the platform
(1) top and being located on the left of sliding rail (7) is fixedly installed with electric pushrod (12), the right side of the electric pushrod (12) and cunning
Bar (9) is fixedly connected, and is fixedly connected with support rod (13) at the top of the detection case (5), and the left side of the support rod (13) is solid
Surely it is connected with support plate (14), the inside of the support plate (14) offers slide opening (15), the internal left and right of the slide opening (15)
Two sides are connected with motion bar (16), and the left side at the top of the support plate (14) is fixedly connected with connecting plate (17), described
It is connected on the right side of connecting plate (17) threaded rod (18), the left and right sides of threaded rod (18) outer surface is flexibly connected
Have screwed pipe (19), the bottom end of two screwed pipes (19) is fixedly connected with the top of two motion bars (16), two institutes
The bottom end for stating motion bar (16) is fixedly connected to clamping plate (20), and the front and rear sides of two motion bars (16) are fixedly connected with
Have mobile bar (21), the top of the support plate (14) and be located at slide opening (15) front and rear sides offer sliding slot (22), two
The inside of a sliding slot (22) is connected with movable block (23), and the bottom end of four mobile bars (21) is and movable block
(23) it is fixedly connected, the front and rear sides of platform (1) bottom are fixedly connected to fixed plate (24), two fixed plates
(24) inside is connected with inserted link (25), and the front of the front inserted link (25) is fixedly connected with pulling plate (26), described
Be fixedly connected between pulling plate (26) and fixed plate (24) by spring (27), the opposite side of two inserted links (25) by from
Heart mineral wool ontology (28) is flexibly connected, and the top of the centrifugally glass-wool ontology (28) is run through and extends to two clamping plates (20)
Between, the left and right sides of platform (1) bottom is fixedly installed with pedestal (29).
2. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the pedestal
(29) it is made of bottom bar and bottom plate, the bottom of the bottom plate is fixedly installed with non-slip mat, the top of the bottom plate and the company of bottom bar
Connecing angle is 90 degree.
3. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: two folders
The opposite side of plate (20) is fixedly installed with cushion, and two opposite sides of the cushion offer anti-skid chequer.
4. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: described electronic to push away
The bottom of bar (12) is fixedly installed with fixing seat, and the bottom of the fixing seat and the top of platform (1) are fixedly mounted.
5. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: described sleeve pipe
(3) quantity is two, and is evenly distributed on the two sides up and down of connecting rod (2), and the company in the left side of casing (3) and strut (4)
Connecing angle is 90 degree.
6. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the mobile bar
(21) L-shaped, the connection angle of the mobile bar (21) and movable block (23) is 90 degree.
7. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the sliding slot
(22) quantity is two, and two sliding slots (22) and slide opening (15) are in parallel shape, the sliding slot (22) and slide opening (15)
Length it is identical.
8. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the platform
(1) front is fixedly installed with display, and the display is electrically connected with decibel detector (6).
9. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the centrifugation glass
The width of glass cotton ontology (28) is greater than the width of detection case (5), the outer surface of the centrifugally glass-wool ontology (28) and rubber ring
(30) it is bonded.
10. a kind of centrifugally glass-wool sound absorption qualities detection device according to claim 1, it is characterised in that: the screw thread
The right end of bar (18) is fixedly installed with handle, and the outer surface of the handle offers anti-skid chequer, the axle center of the handle, threaded rod
(18) axle center in axle center and screwed pipe (19) is respectively positioned on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910416060.4A CN110196282A (en) | 2019-05-19 | 2019-05-19 | A kind of centrifugally glass-wool sound absorption qualities detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910416060.4A CN110196282A (en) | 2019-05-19 | 2019-05-19 | A kind of centrifugally glass-wool sound absorption qualities detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505158A (en) * | 2021-02-04 | 2021-03-16 | 广东博智林机器人有限公司 | Sound insulation performance test method and test device |
| CN113340994A (en) * | 2021-08-04 | 2021-09-03 | 江苏金圣棋盘玻璃科技发展有限公司 | Cotton goods of glass inhale sound detection device |
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| CN208592608U (en) * | 2018-08-13 | 2019-03-12 | 淮安市力达建设机械有限公司 | Cutting equipment is used in a kind of production of crane |
| CN109374736A (en) * | 2018-10-31 | 2019-02-22 | 四川工程职业技术学院 | A kind of device detecting acoustic material sound insulation value |
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| CN112505158A (en) * | 2021-02-04 | 2021-03-16 | 广东博智林机器人有限公司 | Sound insulation performance test method and test device |
| CN113340994A (en) * | 2021-08-04 | 2021-09-03 | 江苏金圣棋盘玻璃科技发展有限公司 | Cotton goods of glass inhale sound detection device |
| CN113340994B (en) * | 2021-08-04 | 2021-10-26 | 江苏金圣棋盘玻璃科技发展有限公司 | Cotton goods of glass inhale sound detection device |
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Application publication date: 20190903 |