CN112775118A - Automatic fuel pipeline air blowing valve - Google Patents
Automatic fuel pipeline air blowing valve Download PDFInfo
- Publication number
- CN112775118A CN112775118A CN202110134770.5A CN202110134770A CN112775118A CN 112775118 A CN112775118 A CN 112775118A CN 202110134770 A CN202110134770 A CN 202110134770A CN 112775118 A CN112775118 A CN 112775118A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- fuel
- air
- gas
- shaped part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 49
- 238000007664 blowing Methods 0.000 title claims abstract description 25
- 239000010763 heavy fuel oil Substances 0.000 claims abstract description 10
- 239000000295 fuel oil Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 16
- 238000010926 purge Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 43
- 229910052799 carbon Inorganic materials 0.000 abstract description 43
- 230000008021 deposition Effects 0.000 abstract description 39
- 239000003921 oil Substances 0.000 abstract description 17
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 238000002679 ablation Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention is suitable for the technical field of fuel nozzles of engines, in particular to an automatic fuel pipeline blowing valve, which comprises: the T-shaped part is provided with a fuel inlet, and the other side, far away from the fuel inlet, of the T-shaped part is provided with a fuel outlet; a nozzle connected to the tee; the nozzle is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the gas compressor, and a gas circuit is arranged in the T-shaped part in a matching manner; high-pressure gas led out from the gas compressor reaches the combustion chamber through the nozzle, and residual fuel oil in the nozzle is blown off; the high-pressure gas led from the back of the compressor is used for blowing the nozzle, so that the nozzle does not collect oil, and the function of preventing carbon deposition is achieved; the nozzle can effectively prevent carbon deposition on the aspect of engine combustion chamber components, thereby not only preventing the ablation condition caused by the carbon deposition of the nozzle, but also avoiding the conditions of fuel flow reduction, uneven temperature field, engine power reduction and the like caused by the blockage of the nozzle.
Description
Technical Field
The invention relates to the technical field of fuel nozzles of engines, in particular to an automatic fuel pipeline blowing valve.
Background
Two ways of understanding carbon deposition: 1. one is carbon deposition of the engine: during the working process of the engine, unsaturated olefin and colloid in the fuel oil generate a coke-like substance in a high-temperature state; 2. the second is carbon deposition in the electric discharge machining, which is a problem that should be avoided as much as possible, and particularly, the carbon deposition can be a fatal influence in the precision die machining.
Carbon deposition is one of the manifestations of spark machine discharge machining abnormalities. As can be clearly seen in the diagram of a generic engine: the source of power to mixed gas must enter a combustion chamber through an inlet valve; a small amount of gasoline is attached to the intake valve, hydrocarbon, paraffin and colloid which cannot be completely combusted in the gasoline can be burnt into colloidal carbon substances when meeting the high temperature of an engine, and if the oil nozzle is polluted, the sprayed gasoline is not good in atomization state, the gasoline and air are not uniformly mixed, and the amount of the gasoline condensed on the intake valve can be increased.
At present, when an aircraft engine is started, fuel oil is sprayed out through a starting nozzle, a small amount of fuel oil is attached to the inside of the nozzle, and as the sprayed fuel oil is burnt near the nozzle and the radiation temperature is high, hydrocarbons, colloid and other burnt colloidal carbon substances which cannot be completely burnt in the attached fuel are adhered to the inside of the nozzle, and the colloidal carbon substances have the characteristic of absorbing oily substances, the colloidal carbon substances are accumulated to form a large amount of carbon deposition and even block a spray hole, so that the problem of carbon deposition of the nozzle is solved from the source, the carbon deposition cannot be attached to the head of the nozzle, however, the existing domestic engine has no air purging channel, and the carbon deposition conditions of different degrees basically exist.
Disclosure of Invention
The invention aims to provide an automatic fuel pipeline air blowing valve to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme:
an automatic fuel line blow-off valve comprising:
the T-shaped part is provided with a fuel inlet, and the other side, far away from the fuel inlet, of the T-shaped part is provided with a fuel outlet;
a nozzle connected to the tee;
and the nozzle is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the compressor, a gas circuit is arranged in the T-shaped part in a matched mode, and the gas circuit and the gas guide structure are used for guiding the high-pressure gas to blow off residual fuel oil in the nozzle and the T-shaped part.
When the pressure of the fuel oil is higher than the rear air pressure of the air compressor, the air path is closed, the fuel oil is supplied to the starting nozzle from the oil path, when the pressure of the fuel oil is lower than the rear air pressure of the air compressor, the oil path is closed, the high-pressure gas led out from the air compressor reaches the combustion chamber through the nozzle, and the residual fuel oil in the nozzle is blown off; the high-pressure gas led from the back of the compressor is used for blowing the nozzle, so that the nozzle does not collect oil, and the function of preventing carbon deposition is achieved; the nozzle carbon deposition prevention device can effectively play a role in preventing carbon deposition on the aspect of engine combustion chamber components, obviously weakens the carbon deposition condition of the nozzle compared with the prior art, prevents the ablation condition caused by the carbon deposition of the nozzle, and simultaneously avoids the conditions of fuel flow reduction, uneven temperature field, engine power reduction and the like caused by the blockage of the nozzle.
In the automatic fuel pipeline air blowing valve of the invention: the air guide structure is an air inlet which is communicated with the air compressor, and high-pressure air is introduced by the air compressor to flow through the air inlet and enter the nozzle. The high-pressure gas led from the back of the compressor is used for blowing the nozzle, so that the nozzle does not collect oil, and the function of preventing carbon deposition is achieved.
In the automatic fuel pipeline air blowing valve of the invention: a hexagonal nut is additionally arranged on the nozzle, and the hexagonal nut is sleeved on the nozzle.
Further scheme: the hexagonal nut is sleeved on the sealing ring for sealing.
In the automatic fuel pipeline air blowing valve of the invention: the T-shaped piece is internally provided with a piston.
In the automatic fuel pipeline air blowing valve of the invention: the nozzle and the T-shaped piece are detachably connected.
Further scheme: the nozzle is detachably connected with the T-shaped piece through a nut, and a sealing structure is additionally arranged at the connection position of the nozzle and the T-shaped piece.
Preferably: the sealing structure is a sealing seat.
Compared with the prior art, the automatic fuel pipeline air blowing valve comprises: the T-shaped part is provided with a fuel inlet, and the other side, far away from the fuel inlet, of the T-shaped part is provided with a fuel outlet; a nozzle connected to the tee; the nozzle is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the compressor, a gas circuit is arranged in the T-shaped part in a matched mode, and the gas circuit and the gas guide structure are used for guiding the high-pressure gas to blow off residual fuel oil in the nozzle and the T-shaped part; when the pressure of the fuel oil is higher than the rear air pressure of the air compressor, the air path is closed, the fuel oil is supplied to the starting nozzle from the oil path, when the pressure of the fuel oil is lower than the rear air pressure of the air compressor, the oil path is closed, the high-pressure gas led out from the air compressor reaches the combustion chamber through the nozzle, and the residual fuel oil in the nozzle is blown off; the high-pressure gas led from the back of the compressor is used for blowing the nozzle, so that the nozzle does not collect oil, and the function of preventing carbon deposition is achieved; the nozzle carbon deposition prevention device can effectively play a role in preventing carbon deposition on the aspect of engine combustion chamber components, obviously weakens the carbon deposition condition of the nozzle compared with the prior art, prevents the ablation condition caused by the carbon deposition of the nozzle, and simultaneously avoids the conditions of fuel flow reduction, uneven temperature field, engine power reduction and the like caused by the blockage of the nozzle.
The problem of carbon deposition of the nozzle is solved from the source, and the problem that carbon deposition cannot be adhered to the head of the nozzle is solved, namely, the existing domestic engine has no air purging channel and basically has carbon deposition conditions of different degrees.
Drawings
FIG. 1 is a schematic diagram of a transverse cross-sectional structure of the automatic fuel pipeline air-blowing valve of the present invention.
In the figure: 1-a nut; 2-a T-shaped part; 3-a piston; 4-sealing seat; 5-a hexagonal nut; 6-sealing ring; 7-a nozzle; 8-an air inlet; 9-fuel inlet; 10-fuel outlet.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the embodiment of the invention, as shown in fig. 1, an automatic fuel pipeline air blowing valve comprises: the T-shaped part 2 is provided with a fuel inlet 9, and the other side, far away from the fuel inlet 9, of the T-shaped part 2 is provided with a fuel outlet 10; a nozzle 7, said nozzle 7 being connected to the tee 2; and the nozzle 7 is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the compressor, a gas path is arranged in the T-shaped part 2 in a matching manner, and the high-pressure gas is guided by the gas path and the gas guide structure to blow off residual fuel oil in the nozzle 7 and the T-shaped part 2.
In the embodiment of the invention, when the pressure of fuel oil is greater than the rear air pressure of the air compressor, the air path is closed, the fuel oil is supplied to the starting nozzle 7 from the oil path, when the pressure of the fuel oil is less than the rear air pressure of the air compressor, the oil path is closed, high-pressure gas led out from the air compressor reaches a combustion chamber through the nozzle 7, and residual fuel oil in the nozzle 7 is blown off; the nozzle 7 is purged by high-pressure gas led from the rear of the compressor, so that the nozzle 7 does not collect oil, and the function of preventing carbon deposition is achieved; the nozzle 7 can effectively prevent carbon deposition in the aspect of engine combustion chamber components, and the carbon deposition condition of the nozzle 7 is obviously weakened compared with the prior art, so that the ablation condition caused by the carbon deposition of the nozzle 7 is prevented, and the conditions of fuel flow reduction, uneven temperature field, engine power reduction and the like caused by the blockage of the nozzle 7 are avoided.
In the embodiment of the invention, as shown in fig. 1, the air guide structure is an air inlet 8, the air inlet 8 is communicated with the compressor, and high-pressure air is introduced by the compressor and flows through the air inlet 8 to enter the nozzle 7. The high-pressure gas led from the back of the compressor is used for purging the nozzle 7, so that the nozzle 7 does not collect oil, and the function of preventing carbon deposition is achieved.
Aiming at the situation, the air compressor for providing high-pressure air can be replaced by a high-pressure air pump or other equipment capable of providing high-pressure air, but the condition that the introduced high-pressure air can blow the nozzle 7 to prevent the nozzle 7 from collecting oil can be met, so that the carbon deposition is prevented, the optimized air inlet 8 is communicated with the air compressor, and the high-pressure air is introduced by the air compressor to flow through the air inlet 8 and enter the nozzle 7.
In the embodiment of the invention, as shown in fig. 1, a hexagonal nut 5 is additionally arranged on the nozzle 7, and the hexagonal nut 5 is sleeved on the nozzle 7. The hexagonal nut 5 is sleeved on the sealing ring 6 for sealing.
The hexagonal nut 5 can also be replaced by a quadrangular nut, a pentagonal nut and a heptagonal nut, and the specific type is not limited.
In the automatic fuel pipeline air blowing valve of the invention: the tee 2 has a piston 3 mounted therein. The nozzle 7 and the T-shaped part 2 are detachably connected. The nozzle 7 is detachably connected with the T-shaped part 2 through a nut, and a sealing structure is additionally arranged at the connection position of the nozzle 7 and the T-shaped part 2. The sealing structure is a sealing seat 4.
The invention relates to an automatic fuel pipeline air blowing valve, which comprises: the T-shaped part 2 is provided with a fuel inlet 9, and the other side, far away from the fuel inlet 9, of the T-shaped part 2 is provided with a fuel outlet 10; a nozzle 7, said nozzle 7 being connected to the tee 2; the nozzle 7 is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the compressor, a gas path is arranged in the T-shaped part 2 in a matching manner, and the gas path and the gas guide structure are used for guiding the high-pressure gas to blow off residual fuel oil in the nozzle 7 and the T-shaped part 2; when the pressure of the fuel oil is higher than the rear air pressure of the air compressor, the air path is closed, the fuel oil is supplied to the starting nozzle 7 from the oil path, when the pressure of the fuel oil is lower than the rear air pressure of the air compressor, the oil path is closed, the high-pressure gas led out from the air compressor reaches a combustion chamber through the nozzle 7, and the residual fuel oil in the nozzle 7 is blown off; the nozzle 7 is purged by high-pressure gas led from the rear of the compressor, so that the nozzle 7 does not collect oil, and the function of preventing carbon deposition is achieved; the nozzle 7 can effectively prevent carbon deposition in the aspect of engine combustion chamber components, and the carbon deposition condition of the nozzle 7 is obviously weakened compared with the prior art, so that the ablation condition caused by the carbon deposition of the nozzle 7 is prevented, and the conditions of fuel flow reduction, uneven temperature field, engine power reduction and the like caused by the blockage of the nozzle 7 are avoided.
The problem of carbon deposition of the nozzle is solved from the source, and the problem that carbon deposition cannot be adhered to the head of the nozzle is solved, namely, the existing domestic engine has no air purging channel and basically has carbon deposition conditions of different degrees.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. An automatic fuel pipeline air blowing valve is characterized in that,
the method comprises the following steps:
the T-shaped part is provided with a fuel inlet, and the other side, far away from the fuel inlet, of the T-shaped part is provided with a fuel outlet;
a nozzle connected to the tee;
and the nozzle is provided with a gas guide structure capable of guiding high-pressure gas, the gas guide structure is communicated with the compressor, a gas circuit is arranged in the T-shaped part in a matched mode, and the gas circuit and the gas guide structure are used for guiding the high-pressure gas to blow off residual fuel oil in the nozzle and the T-shaped part.
2. An automatic fuel oil pipeline air blowing valve as claimed in claim 1, wherein the air guide structure is an air inlet, the air inlet is communicated with a compressor, and high-pressure air is introduced by the compressor to flow through the air inlet and enter the nozzle.
3. An automatic fuel oil pipeline air blowing valve as claimed in claim 1, wherein a hexagonal nut is additionally arranged on the nozzle, and the hexagonal nut is sleeved on the nozzle.
4. An automatic fuel pipeline air blowing valve as claimed in claim 3, wherein the hexagonal nut seals by sleeving on a sealing ring.
5. An automatic fuel line purging valve as claimed in claim 1, wherein a piston is mounted inside the tee.
6. An automatic fuel pipeline air-blowing valve as claimed in any one of claims 1 to 5, wherein said nozzle and said T-piece are detachably connected.
7. An automatic fuel pipeline air-blowing valve as claimed in claim 6, wherein the nozzle and the T-shaped piece are detachably connected through a nut, and a sealing structure is additionally arranged at the connection part of the nozzle and the T-shaped piece.
8. An automatic fuel pipeline air-blowing valve as recited in claim 7, wherein said sealing structure is a sealing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134770.5A CN112775118A (en) | 2021-01-29 | 2021-01-29 | Automatic fuel pipeline air blowing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134770.5A CN112775118A (en) | 2021-01-29 | 2021-01-29 | Automatic fuel pipeline air blowing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112775118A true CN112775118A (en) | 2021-05-11 |
Family
ID=75760185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110134770.5A Pending CN112775118A (en) | 2021-01-29 | 2021-01-29 | Automatic fuel pipeline air blowing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112775118A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938418A (en) * | 1988-12-01 | 1990-07-03 | Fuel Systems Textron Inc. | Modular fuel nozzle assembly for gas turbine engines |
| CN203627912U (en) * | 2013-12-03 | 2014-06-04 | 西安航空动力控制科技有限公司 | Dynamic seal structure |
| CN107829831A (en) * | 2017-12-18 | 2018-03-23 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of gas turbine starting cleaning valve |
| CN107905898A (en) * | 2017-12-18 | 2018-04-13 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of miniature gas turbine fuel system and its control method |
| EP3456231A1 (en) * | 2017-09-14 | 2019-03-20 | BSH Hausgeräte GmbH | Upright vacuum cleaner with pivotal support for accessories |
| US20200025153A1 (en) * | 2018-07-22 | 2020-01-23 | Florin Tamas | Internal carburetor purging device and method of use thereof |
| CN112254169A (en) * | 2020-10-20 | 2021-01-22 | 中国航发沈阳发动机研究所 | Sealing structure of secondary oil way fuel nozzle valve |
| CN215198711U (en) * | 2021-01-29 | 2021-12-17 | 安徽应流航空科技有限公司 | Automatic fuel pipeline air blowing valve |
-
2021
- 2021-01-29 CN CN202110134770.5A patent/CN112775118A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938418A (en) * | 1988-12-01 | 1990-07-03 | Fuel Systems Textron Inc. | Modular fuel nozzle assembly for gas turbine engines |
| CN203627912U (en) * | 2013-12-03 | 2014-06-04 | 西安航空动力控制科技有限公司 | Dynamic seal structure |
| EP3456231A1 (en) * | 2017-09-14 | 2019-03-20 | BSH Hausgeräte GmbH | Upright vacuum cleaner with pivotal support for accessories |
| CN107829831A (en) * | 2017-12-18 | 2018-03-23 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of gas turbine starting cleaning valve |
| CN107905898A (en) * | 2017-12-18 | 2018-04-13 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of miniature gas turbine fuel system and its control method |
| US20200025153A1 (en) * | 2018-07-22 | 2020-01-23 | Florin Tamas | Internal carburetor purging device and method of use thereof |
| CN112254169A (en) * | 2020-10-20 | 2021-01-22 | 中国航发沈阳发动机研究所 | Sealing structure of secondary oil way fuel nozzle valve |
| CN215198711U (en) * | 2021-01-29 | 2021-12-17 | 安徽应流航空科技有限公司 | Automatic fuel pipeline air blowing valve |
Non-Patent Citations (1)
| Title |
|---|
| 韩斐;王洲伟;: "某型航空发动机综合油封设备的研制", 液压与气动, no. 04, 15 April 2015 (2015-04-15), pages 95 - 97 * |
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