JPS60198046A - Rotary-anode x-ray tube - Google Patents

Rotary-anode x-ray tube

Info

Publication number
JPS60198046A
JPS60198046A JP59053801A JP5380184A JPS60198046A JP S60198046 A JPS60198046 A JP S60198046A JP 59053801 A JP59053801 A JP 59053801A JP 5380184 A JP5380184 A JP 5380184A JP S60198046 A JPS60198046 A JP S60198046A
Authority
JP
Japan
Prior art keywords
retainer
rotor
ray tube
anode
rotating shaft
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
Application number
JP59053801A
Other languages
Japanese (ja)
Inventor
Kenji Endo
健二 遠藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP59053801A priority Critical patent/JPS60198046A/en
Publication of JPS60198046A publication Critical patent/JPS60198046A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00X-ray tubes
    • H01J35/02Details
    • H01J35/04Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08Anodes; Anti cathodes
    • H01J35/10Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/101Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
    • H01J35/1017Bearings for rotating anodes
    • H01J35/1024Rolling bearings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00X-ray tubes
    • H01J2235/10Drive means for anode (target) substrate
    • H01J2235/1046Bearings and bearing contact surfaces
    • H01J2235/1053Retainers or races

Abstract

PURPOSE:To increase the life of a rotary-anode X-ray tube by supporting a rotary shaft for a rotary anode by means of bearings each consisting of a retainer prepared from a self-lubricating material and a ball, an inner race and an outer race at least one of which is coated with a light metal. CONSTITUTION:An umbrella-like anode target 4 facing the cathode 2 of an X- ray tube is rotated by a rotor 6. A rotary shaft 8 for the target 4 is rotated while being supported by a stator 9, which is fixed to the end of an encircling case 1, through bearings 12 and 13. Each of the bearings 12 and 13 consists of an inner race 14, an outer race 15, a ball 17 and a retainer 16. The retainer 16 is prepared from a self-lubricating material such as MoS2. At least one of the ball 17 and the races 14 and 15 is coated with a light metal such as Ag. As a result, Ag acts as a lubricant until MoS2 contained in the retainer 16 transfers, thereby avoiding a nonlubricous state of the bearing and increasing the life of the X-ray tube.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は回転陽極型X線管処係シ、特にその回転機構
の改良に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rotating anode type X-ray tube processing system, and particularly to improvements in its rotation mechanism.

〔発明の技術的背景〕[Technical background of the invention]

一般にxll管は、例えばX線診断として医療用に利用
されているが、胃の検診などの場合には、従来第1図に
示すようなX線管が用いられている。このX線管は、い
わゆる回転陽極型といわれるもので、外囲器1の一方に
陰極互が配設され、熱電子を放出する陰極フィラメント
及び集束電極を内蔵したカッf3が偏心して設けられて
いる。又、外囲器1の中央付近には、陰極互に対向して
略傘状の陽極ターゲット4が配設されている。この陽極
ターゲット4は、前記陰極互との間に高電位差を設け、
陰極フィラメントから放出された電子を加速して衝突さ
せ、制動輻射によってX線を発生させるとともに、その
際に発生する多量の熱を貯蔵および放熱するためのもの
であシ、熱発生面積を実効的に広げるために高速度で回
転できるようになっている。このような陽極ターゲット
4は支持柱5を介して有蓋円筒状ローター6に連結され
ている。
Generally, XLL tubes are used for medical purposes, for example, for X-ray diagnosis, and in cases such as gastric examination, an X-ray tube as shown in FIG. 1 has been conventionally used. This X-ray tube is of the so-called rotating anode type, in which cathodes are arranged on one side of an envelope 1, and a cup 3 containing a cathode filament that emits thermionic electrons and a focusing electrode is provided eccentrically. There is. Further, near the center of the envelope 1, a substantially umbrella-shaped anode target 4 is arranged so as to face the cathodes. This anode target 4 provides a high potential difference between the cathodes,
Electrons emitted from the cathode filament are accelerated and collided to generate X-rays by bremsstrahlung radiation, and the large amount of heat generated at that time is stored and radiated. It can be rotated at high speed to spread it out. Such an anode target 4 is connected to a covered cylindrical rotor 6 via a support column 5.

このローター6は、外囲器1外に配設されたステータ7
が発生する回転磁界を受けて回転力を生じるもので、ス
テータ7と共に誘導電動機を形成している。尚、支持柱
5とローター6は一体になっている。ローター6の内側
忙は、軸心に沿って回転軸8が配設され、この回転軸8
の一端はねじ等(図示せず)Kよジローター6に固着さ
れている。この回転軸6と前記ローター6との間には有
底筒状の固定子9が同軸的に配設され、一端が封着リン
グ10.11を介して前記外囲器IK固定されている。
This rotor 6 is connected to a stator 7 disposed outside the envelope 1.
It generates rotational force in response to a rotating magnetic field generated by the stator 7, and together with the stator 7, it forms an induction motor. Note that the support column 5 and the rotor 6 are integrated. A rotating shaft 8 is disposed along the axis of the rotor 6, and this rotating shaft 8
One end of the rotor 6 is fixed to the gerotor 6 with a screw K or the like (not shown). A bottomed cylindrical stator 9 is coaxially disposed between the rotating shaft 6 and the rotor 6, and one end thereof is fixed to the envelope IK via a sealing ring 10.11.

尚、この固定子9は一部が管外に露出しておシ、X線管
全体を外部に支持固定する役目と、外部から陽極ターゲ
ット4に電流を導く役目も果している。そして固定子9
と前記回転軸8との間には、ベアリング12.13が介
在配設され、回転軸8が自由に回転するようになってい
る。さて、動作時には陰極フィラメントから放出された
電子がターゲット4に到達した時のノfワーは、陽極電
圧50kV、電流20 mAの場合、1 kWに達する
Incidentally, this stator 9 is partially exposed outside the tube, and also serves to support and fix the entire X-ray tube to the outside and to guide current to the anode target 4 from the outside. and stator 9
A bearing 12.13 is interposed between the rotary shaft 8 and the rotary shaft 8, so that the rotary shaft 8 can freely rotate. During operation, the power when electrons emitted from the cathode filament reach the target 4 reaches 1 kW when the anode voltage is 50 kV and the current is 20 mA.

この74’ワーの99%以上が熱に変換されるので、タ
ーゲット4は外部への熱輻射と他の部分への熱伝導を伴
いながら高温度に加熱される。熱輻射は温度の4乗に比
例して増加するので、高温になると放熱が大きく増加し
、短時間で熱平衡に達する。例えば前記の条件では5分
後に1100℃で平衡する。一方、熱伝導による熱の伝
達は、伝導媒体の他端が熱的にフリーの場合には、長時
間かかつて徐々に端部が高温となる。そしてターゲット
4の熱はローター6、回転軸8に伝えられ、これらを高
温にする。ローター6が高温になれば、前述したように
熱輻射が増加して熱的に平衡に達する6前記した条件で
は、支持柱6上の0点は通電開始後約15分で800℃
、ローター6の0点では通電開始後30分で550℃、
ベアリング12の近傍の0点では通電開始後約50分で
400℃で熱平衡に達するものもある。ベアリング12
.13は、金属製の内輪、外輪レース及びメールから構
成されておシ、それらの間の摩耗を少なくするために、
表面に鉛、銀、金等の固体潤滑材を付着しである。
Since more than 99% of this 74' power is converted into heat, the target 4 is heated to a high temperature with heat radiation to the outside and heat conduction to other parts. Thermal radiation increases in proportion to the fourth power of temperature, so as the temperature rises, heat radiation increases significantly and thermal equilibrium is reached in a short time. For example, under the above conditions, equilibration occurs at 1100°C after 5 minutes. On the other hand, when heat is transferred by thermal conduction, if the other end of the conductive medium is thermally free, the end gradually becomes hotter over a long period of time. The heat of the target 4 is then transferred to the rotor 6 and rotating shaft 8, making them hot. When the rotor 6 becomes high temperature, thermal radiation increases as described above and reaches thermal equilibrium. 6 Under the above conditions, the zero point on the support column 6 reaches 800 degrees Celsius approximately 15 minutes after the start of energization.
, at the zero point of rotor 6, the temperature is 550°C 30 minutes after the start of energization,
At the 0 point near the bearing 12, thermal equilibrium may be reached at 400° C. approximately 50 minutes after the start of energization. Bearing 12
.. 13 is composed of a metal inner ring, outer ring race, and mail, and in order to reduce wear between them,
A solid lubricant such as lead, silver, or gold is attached to the surface.

〔背景技術の問題点〕[Problems with background technology]

前記のような従来のX線管においては、ベアリングが−
ルが高温になシ易く、これに付着しである固体潤滑材が
蒸発したシ、ゴールと内。
In the conventional X-ray tube as mentioned above, the bearing is
The solid lubricant that adheres to it evaporates and the inside of the goal is easily exposed to high temperatures.

外輪レースとの摩擦によシ固体潤滑材が摩耗し、潤滑不
良を来たし、一度その状態に陥ると、潤滑材の供給がな
いため、回転不能な状態に陥シX線管の寿命の原因とな
る場合が多い。その対策として% Mo’82合金等の
自己潤滑性のある材料からなるリテーナを装着したベア
リングを具備した回転陽極型X線管が提案されてbて、
リテーナからゴールへ更にゴールから内、外輪レースに
潤滑材が供給され、長寿命を図っている。
Friction with the outer race causes the solid lubricant to wear out, resulting in poor lubrication, and once this condition occurs, the lack of lubricant supply makes it impossible to rotate, which can shorten the life of the X-ray tube. This is often the case. As a countermeasure, a rotating anode X-ray tube equipped with a bearing equipped with a retainer made of a self-lubricating material such as Mo'82 alloy has been proposed.
Lubricant is supplied from the retainer to the goal, and from the goal to the inner and outer races, ensuring a long life.

ところが前記リテーナを使用するには、次のような問題
がある。即ち、Mo82合金等がリテーナからが一部に
、更にポールから内、外輪レースに転移するKは、約3
0時間もの間、ロータを駆動しなければならない。その
ために、製造工程上の時間のロスが生じ、更に駆動初期
には、が−ルと内、外輪レースが無潤滑であるので、表
面に損傷が生じ、ベアリングに起因する振動、騒音の問
題が発生し易い。又、Mo82合金等がゾール、内、外
輪レースに転移した後の実使用時に、Mo 82合金が
一時的に一部分がはがれるような事態が生じ、その際に
もぎ一部及び内、°外輪レースに損傷が生じ、更には潤
滑不良に基づく撮動1.騒音が生ずるという欠点がある
However, using the retainer has the following problems. In other words, the K at which Mo82 alloy, etc. is transferred from the retainer to a portion and further from the poles to the inner and outer races is approximately 3.
The rotor must be driven for 0 hours. This results in a loss of time in the manufacturing process, and in the early stages of driving, the wheels and inner and outer races are not lubricated, resulting in damage to the surfaces and problems with vibration and noise caused by the bearings. Easy to occur. Additionally, during actual use after the Mo82 alloy has transferred to the sole, inner and outer race, a portion of the Mo82 alloy may be temporarily peeled off, causing damage to part of the grip and the inner and outer race. Imaging due to damage and even poor lubrication 1. The disadvantage is that it generates noise.

〔発明の目的〕[Purpose of the invention]

この発明の目的は、MO82合金等の自己潤滑性のある
材料からなるリテーナをベアリングに装着した場合でも
、低振動、低騒音且つ長寿命の回転陽極型X線管を提供
することである。
An object of the present invention is to provide a rotating anode type X-ray tube that has low vibration, low noise, and long life even when a retainer made of a self-lubricating material such as MO82 alloy is attached to a bearing.

〔発明の概要〕[Summary of the invention]

この発明は、ベアリングが内輪レース、外輪レース、及
び両者間に位置するゴール、リテーナからなシ、且つ前
記リテーナは自己潤滑性材料によ多形成され、更に前記
ゴール、内輪レース、外輪レースの少なくともいずれか
には、予め軟金属又は合金がコーティングされてなる回
転陽極型X線管である。
The present invention provides a bearing comprising an inner race, an outer race, a goal located between the two, and a retainer, the retainer being made of a self-lubricating material, and at least one of the goal, the inner race, and the outer race. Either one is a rotating anode type X-ray tube that is coated with a soft metal or alloy in advance.

又、他の発明は、ベアリングが内輪レース、外輪レース
、及び両者間に位置するポール、リテーナからなシ、且
つ前記リテーナは自己潤滑性材料によ多形成され、更に
前記ゾール、内輪レース、外輪レースの少なくともいず
れかは、セラミックスによ多形成されてなる回転陽極型
X線管である。
In another invention, the bearing includes an inner race, an outer race, a pole located between the two, and a retainer, and the retainer is made of a self-lubricating material, and the bearing further includes the inner race, the inner race, and the outer race. At least one of the races is a rotating anode type X-ray tube made of ceramic.

〔発明の実施例〕[Embodiments of the invention]

この発明は上記従来の問題点を解消するために、ベアリ
ングを改善したもので、ベアリングについてのみ説明す
ることKする。
This invention improves the bearing in order to solve the above-mentioned conventional problems, and only the bearing will be explained here.

即ち、この発明の回転陽極型X線管におけるベアリング
は第2図に示すように構成され、内輪レース14と外輪
レース15が同軸的に設けられている。この内輪レース
14と外輪レースJ5の間には、環状リテーナ16と複
数のキール17が設けられ、このポール17により内輪
レース14は回転自在になっている。そして、使用時に
は、第1図に示すように内、外輪レース14.15はそ
れぞれ回転軸8と固定子9に固着される。
That is, the bearing in the rotary anode type X-ray tube of the present invention is constructed as shown in FIG. 2, and an inner race 14 and an outer race 15 are coaxially provided. An annular retainer 16 and a plurality of keels 17 are provided between the inner race 14 and the outer race J5, and the pawls 17 allow the inner race 14 to rotate freely. In use, the inner and outer races 14 and 15 are fixed to the rotating shaft 8 and the stator 9, respectively, as shown in FIG.

上記の場合、この発明ではりテーカ16は−Mo S 
2合金等の自己潤滑性材料からなっている。
In the above case, in this invention the beam taker 16 is −Mo S
It is made of self-lubricating material such as 2 alloy.

又、テール17、内輪レース14、外輪レース15の少
なくともいずれかには、Ag等の軟金属又はMo 82
等の合金が潤滑材として予めコーティングされている。
Further, at least one of the tail 17, the inner race 14, and the outer race 15 is made of soft metal such as Ag or Mo 82.
The alloy is pre-coated as a lubricant.

尚、この発明の回転陽極型X線管は、上記ベアリング以
外は従来例(第1図)と同様構成ゆえ、詳細な説明を省
略する。
The rotary anode type X-ray tube of the present invention has the same structure as the conventional example (FIG. 1) except for the above-mentioned bearings, so a detailed explanation will be omitted.

〔発明の効果〕〔Effect of the invention〕

この発明によれば、ベアリングにはMo82等の自己潤
滑性材料からなるリテーナ16が装着され、?−ル17
と内、外輪レース14.15のうち少なくともいずれか
[1Ag等の軟金属又はMo 82等の合金が潤滑材と
して予めコーティングされているので、リテーナ16の
Mo 82合金等がポール17や内、外輪レース14.
16に転移するまでの間、Ag等の軟金属又はMo 8
2等の合金が潤滑材として働き、ポール17と内、外輪
レース14.15との無潤滑状態での接触は回避できる
。この結果、?−ル17や内、外輪レース14.15の
損傷を防ぎ、ベアリングに起因する撮動、騒音を低下で
きる。又、X線管を使用しているとき、転移したMo 
82合金等の潤滑材が一時的に部分的にはがれた場合も
、Ag等の軟金属又はMo 82等の合金が露出し、そ
れが潤滑材として働き、潤滑不良による振動、騒音の問
題も克服できる。
According to this invention, the bearing is fitted with a retainer 16 made of a self-lubricating material such as Mo82, -Le 17
At least one of the inner and outer races 14 and 15 [1 Ag or other soft metal or an alloy such as Mo 82 is coated as a lubricant in advance, so that the Mo 82 alloy or the like of the retainer 16 is coated with the pole 17 and the inner and outer races. Race 14.
Until the transition to 16, soft metals such as Ag or Mo 8
The No. 2 alloy acts as a lubricant, and contact between the pawl 17 and the inner and outer races 14 and 15 without lubrication can be avoided. As a result,? - It is possible to prevent damage to the wheels 17 and the inner and outer races 14 and 15, and to reduce noise caused by bearings. Also, when using an X-ray tube, the transferred Mo
Even if a lubricant such as 82 alloy is temporarily partially peeled off, soft metals such as Ag or alloys such as Mo 82 are exposed, which acts as a lubricant and overcomes the problems of vibration and noise caused by poor lubrication. can.

このようにこの発明では、動作の初期にはAg潤滑材が
作用し、30時間以上という長時間後はりテーカ16の
Mo S 2潤清材が作用してくるので、高性能が維持
され、且つ長寿命が期待できる。
In this way, in this invention, the Ag lubricant acts at the beginning of the operation, and the Mo S 2 lubricant of the beam taker 16 acts after a long period of 30 hours or more, so that high performance is maintained. You can expect a long life.

〔他の発明の実施例〕[Embodiments of other inventions]

この他の発明におけるイアリングも、上記と同様に内、
外輪レース14 、15、リテーナ16、及びポール1
7から構成されている。そして、リテーナ16は、上記
と同様にMo 82合金等の自己潤滑性材料からなって
いる。又、yk” −ル17、内輪レース14I外輪レ
ース15のうち少なくともいずれかは、At203又は
5t3N4等のセラミックからなっている。
Earrings in other inventions also include:
Outer race 14, 15, retainer 16, and pole 1
It consists of 7. Similarly to the above, the retainer 16 is made of a self-lubricating material such as Mo 82 alloy. Further, at least one of the yk"-rule 17, the inner race 14I and the outer race 15 is made of ceramic such as At203 or 5t3N4.

〔他の発明の効果〕[Effects of other inventions]

この場合も、リテーナ16のMo 82合金が?−ル1
7及び内、外輪レース14.15に転移するまで、更に
実際の使用時、はがれた場合でも、上記最初の発明と同
様の効果を得ることができる。
Also in this case, is the Mo 82 alloy of the retainer 16? -Le 1
7 and the inner and outer race races 14 and 15, and even if it peels off during actual use, the same effect as the first invention can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の回転陽極型X線管を示す断面図、第2図
はこの発明の一実施例に係る回転陽極型X線管の要部(
ベアリング)を一部切欠いて示す斜視図である。 J・・・外囲器、4・・・陽極ターff、)、5・・・
支持柱、6・・・ローター、8・・・回転軸、9・・・
固定子、12.13・・・ベアリング、14・・・内輪
レース、15・・・外輪レース、16・・・リテーナ、
17・・・?−ル。 第1図 第2図 ??
FIG. 1 is a sectional view showing a conventional rotating anode X-ray tube, and FIG. 2 is a main part of a rotating anode X-ray tube according to an embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view of the bearing. J... Envelope, 4... Anode tarff, ), 5...
Support column, 6... Rotor, 8... Rotating shaft, 9...
Stator, 12.13... Bearing, 14... Inner race, 15... Outer race, 16... Retainer,
17...? -L. Figure 1 Figure 2? ?

Claims (2)

【特許請求の範囲】[Claims] (1)外囲器内に配設され陽極ターゲットを固着した支
持柱を一端に同軸的に突設した円筒状ローターと、該ロ
ーターの内側に同軸的に固着された回転軸と、該回転軸
と前記ローターとの間に配設され一部が管外に露出した
筒状固定子と、該固定子と前記回転軸との間に介在配設
されたベアリングとを具備した回転陽極型X線管におい
て、 前記ベアリングは内輪レース、外輪レース、及び両者間
に位置するぜ一部、リテーナからなシ、且つ前記リテー
ナは自己潤滑性材料によ多形成され、更に前11ft:
 g−ル、内輪レース、外輪レースの少なくともいずれ
かに軟金属又は合金がコーティングされてなることを特
徴とする回転陽極型Xi管。
(1) A cylindrical rotor with a support column disposed inside an envelope and coaxially protruding from one end to which an anode target is fixed, a rotating shaft coaxially fixed inside the rotor, and the rotating shaft. and a cylindrical stator disposed between the rotor and a portion thereof exposed outside the tube, and a bearing interposed between the stator and the rotating shaft. In the tube, the bearing includes an inner race, an outer race, a gap located between the two, and a retainer, and the retainer is made of a self-lubricating material, and further includes a front 11 ft.
A rotating anode type Xi tube characterized in that at least one of the girder, the inner race, and the outer race is coated with a soft metal or an alloy.
(2)外囲器内に配設され陽極ターゲットを固着した支
持柱を一端に同軸的に突設した円筒状ローターと、該ロ
ーターの内側に同軸的に固着された回転軸と、該回転軸
と前記ローターとの間に配設され一部が管外に露出した
筒状固定子と、該固定子と前記回転軸との間に介在配設
されたベアリングとを具備した回転陽極型X線管におh
て、 前記ベアリングは内輪レース、外輪レース、及び両者間
如位置するポール、リテーナからなり、且づ上記リテー
ナは自己潤滑性材料により形成され、更に前記が−ル、
内輪レース、外輪レースの少々くともいずれかは、セラ
ミックスによ多形成されてなることを特徴とする回転陽
極型X線管。
(2) A cylindrical rotor with a support column disposed inside an envelope and coaxially protruding from one end to which an anode target is fixed, a rotating shaft coaxially fixed to the inside of the rotor, and the rotating shaft. and a cylindrical stator disposed between the rotor and a portion thereof exposed outside the tube, and a bearing interposed between the stator and the rotating shaft. h in the pipe
The bearing comprises an inner race, an outer race, and a pole and a retainer located between the two, and the retainer is made of a self-lubricating material, and the retainer is made of a self-lubricating material;
A rotating anode type X-ray tube characterized in that at least one of the inner race and the outer race is made of ceramic.
JP59053801A 1984-03-21 1984-03-21 Rotary-anode x-ray tube Pending JPS60198046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59053801A JPS60198046A (en) 1984-03-21 1984-03-21 Rotary-anode x-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59053801A JPS60198046A (en) 1984-03-21 1984-03-21 Rotary-anode x-ray tube

Publications (1)

Publication Number Publication Date
JPS60198046A true JPS60198046A (en) 1985-10-07

Family

ID=12952916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59053801A Pending JPS60198046A (en) 1984-03-21 1984-03-21 Rotary-anode x-ray tube

Country Status (1)

Country Link
JP (1) JPS60198046A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4962519A (en) * 1989-03-31 1990-10-09 General Electric Company Lubricated bearing retainer for X-ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4962519A (en) * 1989-03-31 1990-10-09 General Electric Company Lubricated bearing retainer for X-ray tube

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