CN107473597B - Liquid supply system of glass etching machine - Google Patents
Liquid supply system of glass etching machine Download PDFInfo
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- CN107473597B CN107473597B CN201710733179.5A CN201710733179A CN107473597B CN 107473597 B CN107473597 B CN 107473597B CN 201710733179 A CN201710733179 A CN 201710733179A CN 107473597 B CN107473597 B CN 107473597B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
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Abstract
The invention discloses a liquid supply system of a glass etching machine, which is characterized in that a booster air pump is connected with a high-pressure air inlet of a liquid medicine high-pressure barrel, an iron-ion-containing auxiliary liquid medicine filter pressing barrel is connected with a high-pressure mixing barrel through a high-pressure pump, and a plurality of groups of interactive secondary magnetizers are sleeved on the outer pipe wall of a main liquid supply pipe. The etching liquid medicine supplied to the nozzle has an electronic repulsive force along the radial direction, the etching liquid medicine is sprayed out through the nozzle and is condensed into more liquid medicine particles with more uniform particle sizes and is uniformly sprayed downwards, the distance between the adjacent liquid medicine particles in the downwards sprayed liquid medicine particles is more uniform, the diameters of the liquid medicine particles are small and moderate, and the liquid medicine spraying is more uniform.
Description
Technical Field
The invention relates to the technical field of glass etching machines, in particular to a liquid supply system of a glass etching machine.
Background
The glass etching machine sprays liquid medicine downwards through a plurality of spray heads installed on the top of the machine, the liquid medicine is sprinkled on each glass sheet placed on a moving platform to complete etching processing, a liquid supply system needs to be configured on the glass etching machine, the liquid supply system supplies liquid medicine in a grading manner through a plurality of groups of high-pressure pumps, the pressure stability of the liquid medicine is guaranteed, the uniformity of the liquid medicine sprayed by the spray heads is guaranteed, however, the liquid supply system is extremely high in cost and easy to block, the pressure of the liquid medicine is unstable, frequent shutdown maintenance is needed, and therefore improvement is necessary.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a liquid supply system of a glass etching machine, which has the advantages of simple structure, stable liquid supply and uniform liquid medicine spraying.
In order to achieve the purpose, the invention adopts the technical scheme that: a liquid supply system of a glass etching machine comprises a liquid medicine supply pool, an etching medicine hydraulic filter barrel, a high-pressure mixing barrel, a liquid medicine high-pressure barrel, a plurality of high-pressure pumps, a liquid medicine spraying device, an iron ion-containing auxiliary medicine hydraulic filter barrel, a high-pressure mixing barrel, a high-pressure gas tank, a high-pressure seal box, a booster pump and an air compressor, wherein the liquid medicine supply pool is connected with the etching medicine hydraulic filter barrel through the high-pressure pumps; the middle lower part of the inner cavity of the high-pressure seal box is filled with water to form a water-resisting layer, the upper part of the inner cavity of the high-pressure seal box is provided with a cavity to form a high-pressure air chamber, the high-pressure seal box is provided with an air inlet and an air outlet, the inner end of the air inlet is communicated with the water-resisting layer, the outer end of the air inlet is connected with an air compressor, the inner end of the air outlet is communicated with the high-pressure air chamber, the outer end of the air outlet is connected with a booster air pump, the booster air pump is connected with the high-pressure air inlet, high-pressure air entering the liquid medicine high-pressure barrel through the high-pressure air inlet obliquely and upwards impacts liquid medicine in the liquid medicine high-pressure barrel along the tangential direction, and is used for enabling the high-pressure air to be rapidly compressed by the rotating high-pressure liquid medicine and contained in the high-pressure liquid medicine; the iron ion-containing auxiliary liquid medicine filter pressing barrel is connected with the high-pressure mixing barrel through a high-pressure pump and used for providing liquid medicine containing iron ions to the high-pressure mixing barrel, and stirring blades are arranged in the high-pressure mixing barrel and used for forming mixed liquid medicine; the outer pipe wall of main liquid supply pipe is equipped with a plurality of groups of interactive secondary magnetization device, and interactive secondary magnetization device includes a permanent magnet group, a silicon steel sheet group and excitation device, and permanent magnet group and silicon steel sheet group are fixed respectively in the outer pipe wall of main liquid supply pipe, and permanent magnet group and silicon steel sheet group are along the circumferencial direction interval 90 degrees, and silicon steel sheet group connects excitation device for make silicon steel sheet group produce the magnetic field of magnetic field direction and intensity dynamic change.
In a further technical scheme, each liquid supply branch pipe is sleeved with a group of the interactive secondary magnetizers, the outer pipe wall of each liquid supply branch pipe is sleeved with a permanent magnet group and a silicon steel sheet group, and the permanent magnet group and the silicon steel sheet group are spaced by 90 degrees along the circumferential direction.
In a further technical scheme, the permanent magnet group comprises two permanent magnet sheets, the inner side surfaces of the two permanent magnet sheets are both arc-shaped, the inner side surfaces of the two permanent magnet sheets are respectively attached to the outer pipe wall, the inner side surfaces of the two permanent magnet sheets face to each other, and a constant magnetic field is formed between the inner wall surfaces of the two permanent magnet sheets; the silicon steel sheet group comprises two silicon steel magnetic conduction blocks consisting of a plurality of silicon steel sheets, the inner walls of the two silicon steel magnetic conduction blocks are arc-shaped, the inner side surfaces of the two silicon steel magnetic conduction blocks are respectively attached to the outer pipe wall, the inner side surfaces of the two silicon steel magnetic conduction blocks face to each other, and a changing magnetic field with the direction of the magnetic field changing interactively and the dynamic change of the magnetic field intensity is formed between the inner wall surfaces of the two silicon steel magnetic conduction blocks; the constant magnetic field and the variable magnetic field are mutually superposed in the space in the tube and are used for magnetizing the mixed liquid medicine in different degrees when the mixed liquid medicine passes through the interactive secondary magnetizing device so as to form the mixed liquid medicine with different internal magnetization degrees.
In a further technical scheme, a plurality of supports are fixed in the main liquid supply pipe, the supports are cross-shaped, mounting holes are formed in the middle of the supports, a conductive rod is arranged in the middle of the main liquid supply pipe in a hanging and serial mode and fixed in the mounting holes of the supports, a negative electrode is attached to the inner pipe wall of the liquid supply pipe, the conductive rod is connected with a low-voltage direct-current positive electrode, a negative voltage is connected with a low-voltage direct-current negative electrode, and the voltage value of the low-voltage direct current is 50-60V.
In a further technical scheme, a liquid medicine recovery tank is arranged below the liquid medicine spraying device, the liquid medicine recovery tank is connected with a recovered liquid medicine hydraulic filter barrel through a high-pressure pump, and the recovered liquid medicine filter pressing barrel is connected with a liquid medicine supply pool through the high-pressure pump.
After adopting the structure, compared with the prior art, the invention has the advantages that: the etching liquid medicine supplied to the nozzle has an electronic repulsive force along the radial direction, the etching liquid medicine is sprayed out through the nozzle and is condensed into more liquid medicine particles with more uniform particle sizes and is uniformly sprayed downwards, the distance between the adjacent liquid medicine particles in the downwards sprayed liquid medicine particles is more uniform, the diameters of the liquid medicine particles are small and moderate, and the liquid medicine spraying is more uniform.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the interactive secondary magnetization device of the present invention.
In the figure: 1. the device comprises a liquid medicine supply pool 2, an etching medicine hydraulic filter barrel 3, a high-pressure mixing barrel 4, a liquid medicine high-pressure barrel 41, a high-pressure air inlet 5, a high-pressure pump 6, a liquid medicine spraying device 61, a main liquid supply pipe 62, a liquid supply branch pipe 63, an excitation device 64, a permanent magnet iron sheet 65, a silicon steel magnetic conduction block 66, a bracket 67, a conductive rod 68, a negative electrode 69, a spray head 7, an iron ion-containing auxiliary medicine hydraulic filter barrel 8, a high-pressure air tank 9, a high-pressure seal box 91, a water-resisting layer 92, a high-pressure air chamber 10, a booster pump 11, an air compressor 12 and a medicine recovery hydraulic filter barrel.
Detailed Description
The following are merely preferred embodiments of the present invention, and do not limit the scope of the present invention.
A liquid supply system of a glass etching machine is shown in figures 1 and 2 and comprises a liquid medicine supply pool 1, an etching medicine hydraulic filter barrel 2, a high-pressure mixing barrel 3, a liquid medicine high-pressure barrel 4, a plurality of high-pressure pumps 5 and a liquid medicine spraying device 6, wherein the liquid medicine supply pool 1 is connected with the etching medicine hydraulic filter barrel 2 through the high-pressure pumps 5, the etching medicine hydraulic filter barrel 2 filters and stores etching liquid medicine in a pressure maintaining mode, the etching medicine hydraulic filter barrel 2 is connected with the high-pressure mixing barrel 3 through the high-pressure pumps 5 and used for providing etching liquid medicine for the high-pressure mixing barrel 3, the high-pressure mixing barrel 3 is connected with an upper liquid inlet of the liquid medicine high-pressure barrel 4 through the high-pressure pumps 5, a lower liquid outlet of the liquid medicine high-pressure barrel 4 is connected with the liquid medicine spraying device 6 through the high-pressure pumps 5, the liquid medicine spraying device 6 is provided with a main liquid supply pipe 61 and a plurality of liquid supply branch pipes 62, the main liquid supply pipe 61 is respectively communicated with the liquid supply branch pipes 62, a liquid medicine recovery tank is arranged below the liquid medicine spraying device 6, the liquid medicine recovery tank is connected with a recovery tank 12 through the high-pressure pumps 5 and connected with the liquid medicine supply pool 1.
The device also comprises a ferric ion auxiliary medicine hydraulic filter barrel 7, a high-pressure mixing barrel 3, a high-pressure gas tank 8, a high-pressure seal box 9, a pressurization gas pump 10 and an air compressor 11, wherein a high-pressure gas inlet 41 is formed in the middle of the liquid medicine high-pressure barrel 4, the high-pressure gas inlet 41 is tangent to the inner wall of the liquid medicine high-pressure barrel 4, and the high-pressure gas inlet 41 is inclined upwards; the middle-lower part of the inner cavity of the high-pressure seal box 9 is filled with water to form a water-resisting layer 91, the upper part of the inner cavity of the high-pressure seal box 9 is reserved with a cavity to form a high-pressure air chamber 92, the high-pressure seal box 9 is provided with an air inlet and an air outlet, the inner end of the air inlet is communicated with the water-resisting layer 91, the outer end of the air inlet is connected with an air compressor 11, the inner end of the air outlet is communicated with the high-pressure air chamber 92, the outer end of the air outlet is connected with a booster pump 10, the booster pump 10 is connected with a high-pressure air inlet 41, high-pressure air entering the liquid medicine high-pressure barrel 4 through the high-pressure air inlet 41 obliquely upwards impacts liquid medicine in the liquid medicine high-pressure barrel 4 along the tangential direction, and is used for enabling the high-pressure air to be rapidly compressed by the rotating high-pressure liquid medicine and contained in the high-pressure liquid medicine.
The iron ion-containing auxiliary medicine hydraulic filter barrel 7 is connected with the high-pressure mixing barrel 3 through the high-pressure pump 5 and used for providing the liquid medicine containing iron ions for the high-pressure mixing barrel 3, and stirring blades are arranged in the high-pressure mixing barrel 3 and used for forming mixed liquid medicine;
the outer pipe wall of the main liquid supply pipe 61 is sleeved with a plurality of groups of interactive secondary magnetization devices, each interactive secondary magnetization device comprises a permanent magnet group, a silicon steel sheet group and an excitation device 63, the permanent magnet group and the silicon steel sheet group are respectively fixed on the outer pipe wall of the main liquid supply pipe 61, the permanent magnet group and the silicon steel sheet group are spaced by 90 degrees along the circumferential direction, the silicon steel sheet group is connected with the excitation device 63, and the excitation device 63 enables the silicon steel sheet group to generate a magnetic field with dynamically changed magnetic field direction and intensity.
Each liquid supply branch pipe 62 is sleeved with a group of interactive secondary magnetizers, the outer pipe wall of the liquid supply branch pipe 62 is sleeved with a permanent magnet group and a silicon steel sheet group, and the permanent magnet group and the silicon steel sheet group are spaced by 90 degrees along the circumferential direction.
The permanent magnet group comprises two permanent magnet pieces 64, the inner side surfaces of the two permanent magnet pieces 64 are both arc-shaped, the inner side surfaces of the two permanent magnet pieces 64 are respectively pasted on the outer pipe wall, the inner side surfaces of the two permanent magnet pieces 64 face oppositely, and a constant magnetic field is formed between the inner wall surfaces of the two permanent magnet pieces 64; the silicon steel sheet group comprises two silicon steel magnetic conduction blocks 65 consisting of a plurality of silicon steel sheets, the inner walls of the two silicon steel magnetic conduction blocks 65 are arc-shaped, the inner side surfaces of the two silicon steel magnetic conduction blocks 65 are respectively attached to the outer pipe wall, the inner side surfaces of the two silicon steel magnetic conduction blocks 65 face to each other, and a changing magnetic field with the direction of the magnetic field changing interactively and the dynamic change of the magnetic field intensity is formed between the inner wall surfaces of the two silicon steel magnetic conduction blocks 65; the constant magnetic field and the variable magnetic field are mutually superposed in the space in the tube and are used for magnetizing the mixed liquid medicine in different degrees when the mixed liquid medicine passes through the interactive secondary magnetizing device so as to form the mixed liquid medicine with different internal magnetization degrees. The main liquid supply pipe 61 is internally fixed with a plurality of brackets 66, the brackets 66 are cross-shaped, the middle part of each bracket 66 is provided with a mounting hole, the middle part of the main liquid supply pipe 61 is suspended and serially provided with a conducting rod 67, the conducting rod 67 is fixed in the mounting hole of each bracket 66, the inner pipe wall of the liquid supply pipe is adhered with a negative electrode 68, the conducting rod 67 is connected with a low-voltage direct current positive electrode, a negative voltage is connected with the low-voltage direct current negative electrode 68, the voltage value of the low-voltage direct current is 50-60V, the magnetized mixed liquid medicine is sprayed out through a nozzle 69 under the action of the low-voltage direct current voltage provided by the conducting rod 67 and the negative electrode 68, iron ions in the mixed liquid medicine are used as an electric guiding agent, the inner part of the mixed liquid medicine presents certain directionality along the radial direction, etching liquid medicine in the mixed liquid medicine has an electronic repulsive force along the radial direction, the mixed liquid medicine is sprayed out through the nozzle 69, more quantity of liquid medicine particles with more uniform particle sizes and uniformly sprayed downwards, the distances among adjacent liquid medicine particles in the downwards sprayed liquid medicine particles are more uniform, the diameters of the liquid medicine particles are fine and moderate, and the liquid medicine spraying is more uniform.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the present invention is limited to the details of the embodiment and the range of applications, which can be changed by those skilled in the art according to the spirit of the present invention.
Claims (4)
1. The utility model provides a liquid supply system of glass etching machine, including liquid medicine supply tank (1), etching medicine hydraulic pressure filter vat (2), high-pressure mixing bucket (3), liquid medicine high-pressure tank (4), a plurality of high-pressure pump (5) and liquid medicine spray set (6), etching medicine hydraulic pressure filter vat (2) are connected through high-pressure pump (5) in liquid medicine supply tank (1), high-pressure mixing bucket (3) are connected through high-pressure pump (5) in etching medicine hydraulic pressure filter vat (2), be used for providing the etching liquid medicine to high-pressure mixing bucket (3), the upper portion inlet of liquid medicine high-pressure tank (4) is connected through high-pressure pump (5) in high-pressure mixing bucket (3), liquid medicine spray set (6) are connected through high-pressure pump (5) in the lower part liquid outlet of liquid medicine high-pressure tank (4), liquid medicine spray set (6) are provided with main feed pipe (61) and a plurality of liquid feed branch pipes (62), main feed pipe (61) communicate each liquid feed branch pipe (62) respectively, a serial communication, its characterized in that: the device is characterized by further comprising a ferrous ion auxiliary medicine hydraulic filter barrel (7), a high-pressure mixing barrel (3), a high-pressure air tank (8), a high-pressure sealing box (9), a booster pump (10) and an air compressor (11), wherein a high-pressure air inlet (41) is formed in the middle of the liquid medicine high-pressure barrel (4), the high-pressure air inlet (41) is tangent to the inner wall of the liquid medicine high-pressure barrel (4), and the high-pressure air inlet (41) is inclined upwards;
the middle lower part of the inner cavity of the high-pressure seal box (9) is filled with water to form a water-resisting layer (91), a cavity is reserved at the upper part of the inner cavity of the high-pressure seal box (9) to form a high-pressure air chamber (92), the high-pressure seal box (9) is provided with an air inlet and an air outlet, the inner end of the air inlet is communicated with the water-resisting layer (91), the outer end of the air inlet is connected with an air compressor (11), the inner end of the air outlet is communicated with the high-pressure air chamber (92), the outer end of the air outlet is connected with a booster air pump (10), the booster air pump (10) is connected with a high-pressure air inlet (41), high-pressure air entering the liquid medicine high-pressure barrel (4) through the high-pressure air inlet (41) obliquely and upwards impacts liquid medicine in the liquid medicine high-pressure barrel (4) along the tangential direction, and is used for enabling the high-pressure air to be quickly compressed by the rotating high-pressure liquid medicine and contained in the high-pressure liquid medicine;
the iron ion-containing auxiliary medicine hydraulic filter barrel (7) is connected with the high-pressure mixing barrel (3) through the high-pressure pump (5) and is used for providing the liquid medicine containing iron ions for the high-pressure mixing barrel (3), and a stirring blade is arranged in the high-pressure mixing barrel (3) and is used for forming mixed liquid medicine;
the outer pipe wall of the main liquid supply pipe (61) is sleeved with a plurality of groups of interactive secondary magnetization devices, each interactive secondary magnetization device comprises a permanent magnet group, a silicon steel sheet group and an excitation device (63), the permanent magnet group and the silicon steel sheet group are respectively fixed on the outer pipe wall of the main liquid supply pipe (61), the permanent magnet group and the silicon steel sheet group are spaced by 90 degrees along the circumferential direction, and the silicon steel sheet group is connected with the excitation device (63) and used for enabling the silicon steel sheet group to generate a magnetic field with dynamically changed magnetic field direction and strength;
a plurality of supports (66) are fixed in the main liquid supply pipe (61), the supports (66) are in a cross shape, mounting holes are formed in the middle of the supports (66), a conducting rod (67) is arranged in the middle of the main liquid supply pipe (61) in a suspended mode in series, the conducting rod (67) is fixed in the mounting holes of the supports (66), a negative electrode (68) is attached to the inner wall of the liquid supply pipe, the conducting rod (67) is connected with a low-voltage direct-current positive electrode, the negative voltage is connected with the low-voltage direct-current negative electrode (68), and the voltage value of the low-voltage direct current is 50 to 60V.
2. The liquid supply system of the glass etching machine according to claim 1, wherein: each liquid supply branch pipe (62) is sleeved with a group of interactive secondary magnetizers, the outer pipe wall of each liquid supply branch pipe (62) is sleeved with a permanent magnet group and a silicon steel sheet group, and the permanent magnet group and the silicon steel sheet group are spaced by 90 degrees along the circumferential direction.
3. The liquid supply system of the glass etching machine according to claim 1 or 2, wherein: the permanent magnet group comprises two permanent magnet pieces (64), the inner side surfaces of the two permanent magnet pieces (64) are arc-shaped, the inner side surfaces of the two permanent magnet pieces (64) are respectively attached to the outer pipe wall, the inner side surfaces of the two permanent magnet pieces (64) face to each other, and a constant magnetic field is formed between the inner wall surfaces of the two permanent magnet pieces (64);
the silicon steel sheet group comprises two silicon steel magnetic conduction blocks (65) consisting of a plurality of silicon steel sheets, the inner walls of the two silicon steel magnetic conduction blocks (65) are arc-shaped, the inner side surfaces of the two silicon steel magnetic conduction blocks (65) are respectively attached to the outer pipe wall, the inner side surfaces of the two silicon steel magnetic conduction blocks (65) face to each other, and a changing magnetic field with the direction of the magnetic field changing interactively and the dynamic change of the magnetic field intensity is formed between the inner wall surfaces of the two silicon steel magnetic conduction blocks (65); the constant magnetic field and the variable magnetic field are mutually superposed in the space in the tube and are used for magnetizing the mixed liquid medicine in different degrees when the mixed liquid medicine passes through the interactive secondary magnetizing device so as to form the mixed liquid medicine with different internal magnetization degrees.
4. A liquid supply system for a glass etching machine as defined in claim 3, wherein: a liquid medicine recovery tank is arranged below the liquid medicine spraying device (6), the liquid medicine recovery tank is connected with a liquid medicine recovery hydraulic filter barrel (12) through a high-pressure pump (5), and the liquid medicine recovery hydraulic filter barrel (12) is connected with a liquid medicine supply pool (1) through the high-pressure pump (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710733179.5A CN107473597B (en) | 2017-08-24 | 2017-08-24 | Liquid supply system of glass etching machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710733179.5A CN107473597B (en) | 2017-08-24 | 2017-08-24 | Liquid supply system of glass etching machine |
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| CN107473597A CN107473597A (en) | 2017-12-15 |
| CN107473597B true CN107473597B (en) | 2023-03-24 |
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| CN201710733179.5A Active CN107473597B (en) | 2017-08-24 | 2017-08-24 | Liquid supply system of glass etching machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992006042A1 (en) * | 1990-10-05 | 1992-04-16 | Tarn Pure Limited | Fluid treatment apparatus |
| CN2389883Y (en) * | 1998-11-25 | 2000-08-02 | 刘在年 | Liquid alternating field magnetizer |
| CN102223925A (en) * | 2009-01-19 | 2011-10-19 | 报知机股份有限公司 | Fire disaster prevention facility and spraying method |
| WO2016150910A1 (en) * | 2015-03-23 | 2016-09-29 | Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Für Wirtschaft Und Energie, Dieses Vertreten Durch Den Präsidenten Der Physikalisch-Technischen Bundesanstalt | Method for measuring a magnetic property of magnetic nanoparticles |
| CN106694268A (en) * | 2017-02-08 | 2017-05-24 | 安徽鹰龙工业设计有限公司 | Liquid-magnetization-based high-concentration gas-liquid two-phase mixed atomizer |
-
2017
- 2017-08-24 CN CN201710733179.5A patent/CN107473597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992006042A1 (en) * | 1990-10-05 | 1992-04-16 | Tarn Pure Limited | Fluid treatment apparatus |
| CN2389883Y (en) * | 1998-11-25 | 2000-08-02 | 刘在年 | Liquid alternating field magnetizer |
| CN102223925A (en) * | 2009-01-19 | 2011-10-19 | 报知机股份有限公司 | Fire disaster prevention facility and spraying method |
| WO2016150910A1 (en) * | 2015-03-23 | 2016-09-29 | Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Für Wirtschaft Und Energie, Dieses Vertreten Durch Den Präsidenten Der Physikalisch-Technischen Bundesanstalt | Method for measuring a magnetic property of magnetic nanoparticles |
| CN106694268A (en) * | 2017-02-08 | 2017-05-24 | 安徽鹰龙工业设计有限公司 | Liquid-magnetization-based high-concentration gas-liquid two-phase mixed atomizer |
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| CN107473597A (en) | 2017-12-15 |
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