WO2013024835A1 - Lng船 - Google Patents
Lng船 Download PDFInfo
- Publication number
- WO2013024835A1 WO2013024835A1 PCT/JP2012/070594 JP2012070594W WO2013024835A1 WO 2013024835 A1 WO2013024835 A1 WO 2013024835A1 JP 2012070594 W JP2012070594 W JP 2012070594W WO 2013024835 A1 WO2013024835 A1 WO 2013024835A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tank
- lng
- main tank
- membrane
- ship according
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/02—Arrangement of bulkheads, e.g. defining cargo spaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/16—Shells
- B63B3/20—Shells of double type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/12—Large containers rigid specially adapted for transport
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/06—Coverings, e.g. for insulating purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/08—Mounting arrangements for vessels
- F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2241/00—Design characteristics
- B63B2241/02—Design characterised by particular shapes
- B63B2241/10—Design characterised by particular shapes by particular three dimensional shapes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/016—Preventing slosh
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
Definitions
- This invention relates to an LNG ship equipped with a tank for storing LNG (liquefied natural gas).
- LNG ship means not only an LNG carrier ship for transporting LNG from the production area to the consumption area, but also an LNG-FPSO (Floating LNG Production, Storage and Off- loading system) and LNG-FSRU (Floating LNG Storage Storage Re-gasification Unit) with LNG storage tank and regasification plant on board.
- LNG-FPSO Floating LNG Production, Storage and Off- loading system
- LNG-FSRU Floating LNG Storage Storage Re-gasification Unit
- the LNG-FPSO used for this has the function of liquefying the gas generated from the seabed gas field on the ocean to produce LNG, storing it in a tank, and loading it onto an LNG carrier. (Note that the LNG-FSRU has a function of gasifying the LNG received from the LNG carrier and sending it to the land.)
- LNG-FPSO is equipped with a tank to store a large amount of LNG produced, and the tank structure is expected to adopt the LNG tank technology that has been cultivated in the construction of LNG carriers.
- LNG storage tanks are not used in the same way in LNG-FPSO and LNG carrier.
- the LNG storage tank In the case of an LNG carrier, the LNG storage tank is operated in either a full or empty state, and there is no half-loading condition. .
- the tank liquid level changed greatly only during the cargo handling work, but since the cargo handling work was usually carried out in a quiet harbor with wave winds, sloshing was almost negligible.
- LNG-FPSO is always moored in the open sea where the weather conditions are severe, and the liquid level of the LNG storage tank changes momentarily according to the balance between the amount of LNG produced and the amount shipped to the LNG carrier, and the half-load state is routinely Therefore, it is considered that the sloshing phenomenon easily occurs.
- Another important thing with LNG-FPSO is that the loading of coin liquid into the LNG carrier is STS (ship to ship), and in particular, the LNG carrier is placed side by side (side by side) on the LNG-FPSO. It is considered to be used.
- LNG storage tanks conventionally used in LNG carriers include self-supporting spherical tanks (MOSS system tanks), self-supporting square tanks (SPB system), and membrane tanks.
- LNG-FPSO is one of these three tank types. Is expected to be adopted.
- MOSS system tanks self-supporting spherical tanks
- SPB system self-supporting square tanks
- LNG-FPSO is one of these three tank types. Is expected to be adopted.
- spherical tank which is a self-supporting tank made of aluminum alloy, and is supported in a hold made of double hulls through a skirt extending from the equator.
- the heat insulation layer is applied to the outer surface of the tank (outer heat insulation method). Since the free-standing spherical tank is spherical, it has the disadvantages that it does not fit in the hold and volume efficiency is not good. In this type of tank, since it is an outer heat insulating type, even if the load is swollen during stormy weather, the heat insul
- the present invention mainly relates to an LNG ship having a membrane type LNG storage tank (that is, an LNG carrier ship, LNG-FPSO, LNG-FSRU), which has a high volumetric efficiency of the tank and is less likely to cause sloshing of liquid load during stormy weather.
- a membrane type LNG storage tank that is, an LNG carrier ship, LNG-FPSO, LNG-FSRU
- the box-shaped head tank is provided on the deck as well as the main tank formed in the ship, a large tank volume can be obtained without enlarging the hull itself. Further, since the head tank is narrower than the main tank below it, there is an advantage that sloshing hardly occurs when the liquid level of the load reaches the head tank.
- the head tank width is preferably in the range of about 50 to about 70 percent of the width of the main tank in order to achieve a sufficient sloshing reduction effect.
- the head tank does not increase in volume if it is short, and structurally unstable if it is too tall, the head tank height should be in the range of 20 to 60 percent of the tank's width. It is preferable.
- the main tank can be formed in a space surrounded by the double hull structure and the upper deck, with the hull having a double hull structure. Furthermore, left and right vertical bulkheads are provided in a space surrounded by a double hull structure and an upper deck, and the space is divided into three sections, that is, a central section and left and right side sections, with these vertical bulkheads,
- the main tank can be formed in the central compartment.
- the main tank is protected by a triple hull structure (ie, outer shell, inner shell and longitudinal bulkhead), so even if the hull is damaged due to a collision with another ship, the main tank is damaged. Risk can be reduced.
- the left and right side sections formed by the triple hull structure can be effectively used as a condensate tank or a fresh water tank for storing by-products such as LPG generated in the LNG production process.
- the left and right side sections are used as ballast tanks, and the amount of seawater ballast is adjusted to adjust the draft and the hull roll cycle.
- the LNG storage tank is a membrane system, and when severe sloshing occurs, the membrane and heat insulating material are easily damaged by the pressure of the undulating coin liquid.
- the independent LNG storage tank has a heat insulating layer on the outer surface of the tank, sloshing occurs and the heat insulating layer is hardly damaged.
- the position of the liquid level of the coin liquid in the tank is a problem, and if the liquid level is between 20% and 80% of the depth of the tank, it is considered that the sloshing easily occurs and is dangerous.
- an independent LNG storage tank for example, an independent self-supporting tank (Moss) or an independent square tank (SPB system), instead of using a membrane type for all LNG storage tanks.
- Moss independent self-supporting tank
- SPB system independent square tank
- FIG. 5 is a cross-sectional view of the AA hull of FIG. 1 or FIG. 4. It is a schematic side view of an LNG carrier. It is a cross-sectional view of the LNG ship carrying an SPB tank.
- FIG. 1 is a side view of the LNG-FPSO indicated by reference numeral 1a according to the present invention.
- This ship is a refurbishment of what was originally a crude oil / ore ship. Of course, it is also possible to build a new building from the beginning.
- a turret 6 unique to LNG-FPSO is provided at the bow, and a mooring line 7 extending from an anchor fixed to the sea floor is connected to this turret and performs various operations in a single-point mooring state.
- a riser pipe 8 rising from the seabed is also connected to the turret, and natural gas collected in the gas field is sent to the LNG production plant 5 on the ship through this pipe.
- the natural gas is refined and liquefied here, sent to several LNG storage tanks 16 and 23 provided in the tank space 3 and stored.
- the stored LNG is dispensed by placing the LNG carrier on the LNG-FPSO (1a) and loading the coin liquid onto the LNG carrier using a loading arm (not shown) provided on the upper deck.
- Fig. 3 is a cross-sectional view of the central tank of LNG-FPSO, using the double hull structure consisting of outer shell 10 and inner shell 11 provided in the crude oil / ore dedicated ship before refurbishment.
- the space 12 between is used as a seawater ballast tank.
- the space surrounded by the inner shell 11 and the upper deck 13 is also divided into several compartments by a pair of left and right vertical bulkheads 14 and several horizontal bulkheads 15 since it was a crude oil / ore dedicated ship. .
- the compartments in the central row formed between the left and right vertical partition walls 14 were originally crude oil and ore pits, and several membrane-type LNG storage tanks 16 are formed using these compartments.
- the left and right row compartments 17 original crude oil tanks) are used as storage spaces for fresh water and condensate.
- Each membrane tank 16 is composed of a main tank 16a under the deck and a box-shaped head tank 16b on the deck.
- the upper deck had a hatchway for loading ore, and a hatch combing stood around it.
- the head tank 16b is made by extending the side wall and adding a ceiling so as to be added to the hatch combing.
- the head tank made in this way is open on the deck and forms a main tank and one tank through the hole 18 (original Kuraguchi).
- the main tank 16a is formed by forming a heat insulating layer 20 on the inner side of the double bottom 19 and the left and right vertical partition walls 14 and liquid-tightly covering the heat insulating layer 20 with a membrane 21 such as Invar.
- Reference numeral 24 denotes a void space formed on the lower side of the upper deck 13.
- a coffer dam 22 is provided between the front and rear LNG tanks so as to be surrounded by two horizontal partitions (see FIGS. 1 and 2).
- the head tank 16b is similarly provided with a heat insulating layer 20 and a membrane 21 on the inner surface.
- Reference numeral 25 denotes a reinforcing bracket provided around the head tank.
- the head tank 16b can also be formed in a trapezoidal cross section by inclining the side plate as shown by a chain line in FIG.
- LNG storage tank 16 of this LNG ship is characterized in that a head tank 16b is added on a deck directly above the main tank 16a.
- the first advantage of this is that a large tank capacity can be secured as a whole. A capacity increase of 15 to 25 percent is expected compared to the case of the main tank alone.
- the second merit is that by adding the head tank to the main tank, it becomes a tank-like tank as a whole, and the head tank has a smaller width than the main tank, so the liquid level of the coin liquid is the head. If the position is high enough to cover the partial tank, there is an effect that sloshing hardly occurs.
- this ship is provided with only one self-supporting LNG storage tank 23 at the forefront, and the self-supporting LNG tank may be a spherical tank (MOSS type). Method). As described above, this self-supporting tank is intended to prevent the liquid level of the coin liquid in the membrane LNG storage tank 16 from remaining in the sloshing danger zone.
- MOSS type spherical tank
- FIG. 4 is a side view of the LNG carrier 1b (without the production facility 5) according to the present invention.
- This LNG carrier is also a modified crude oil / ore carrier, but may be built from scratch.
- This LNG carrier does not have the LNG production plant 5, the turret 6, and the front-most independent LNG tank 23, but has the same structure as the above-described LNG-FPSO.
- the central tank portion of the LNG carrier is also the same as the above-described LNG-FPSO, as shown in FIGS. 2 and 3 above.
- the left and right row compartments 17 original crude oil tanks are used as storage spaces for fresh water and condensate in LNG-FPSO, but are used as deep tanks for loading ballast in this LNG carrier.
- the ballast deep tank 17 is useful as a countermeasure.
- the loaded liquid load gradually accumulates from the bottom of the LNG tank, so that the center of gravity of the ship tends to be low at first. That is, the ship is in a bottom heavy state, the inherent roll cycle is small, the ship is likely to roll, and there is a risk that the liquid load will violently wave in the LNG tank. (However, as loading proceeds, the liquid level in the LNG tank increases, so the center of gravity of the ship also rises and rolls subside.)
- the LNG-FPSO will gradually float, while the LNG carrier will gradually sink, but the seawater ballast previously loaded in the deep ballast tank 17 will be gradually discharged during the loading operation.
- FIG. 5 shows a configuration in which the LNG storage tank 1 of the LNG ship is constituted by a self-standing rectangular (SPB type) tank 30 instead of the membrane tank 16.
- the tank shape is composed of a main tank 30a below the deck and a head tank 30b on the deck, like the membrane tank of FIG.
- a girder 32 that reinforces the tank wall 31 is provided on the inner surface of the tank, and a heat insulating layer 33 is formed on the outer surface of the tank.
- Reference numeral 34 denotes a support block that supports the bottom and sides of the tank.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
また、これからのLNG運搬船は、気象条件の厳しい外洋において、LNG-FPSOからLNGの積み込みを受けることも考慮しておく必要があり、特に積荷中のスロッシング対策が必要となる。
主タンク16aは、二重底19および左右の縦隔壁14の内側に断熱層20を形成し、さらにその上をインバー等のメンブレン21で液密に覆うことにより形成される。符号24は上甲板13の下側に形成されたボイドスペースである。なお、前後のLNGタンクの間には、2枚の横隔壁で囲まれれる形でコッファーダム22を設ける(図1および図2参照)。頭部タンク16bも、同様に内面に断熱層20とメンブレン21を設ける。
符号25は頭部タンクの周りに設けられている補強用のブラケットである。
なお、頭部タンク16bは、図3に鎖線で示すように、側板を傾斜させて、横断面を台形に形成することもできる。
1a LNG-FPSO
1b LNG運搬船
10 外殻
11 内殻
13 上甲板
14 縦隔壁
15 横隔壁
16 LNG貯蔵タンク
16a 主タンク
16b 頭部タンク
17 左右の側部区画
18 穴
23 自立式角型LNGタンク
30 自立式角型LNGタンク
30a 主タンク
30b 頭部タンク
Claims (10)
- メンブレン式LNG貯蔵タンクを備えており、該タンクが、多重船殻で囲まれた船内スペース内に形成された主タンクと、該主タンクの直上の甲板上に設けられた、該主タンクより幅の小さな箱型の頭部タンクからなり、該主タンクと該頭部タンクは該上甲板にあいた穴を介して連通していることを特徴とするLNG船。
- 自立角型LNG貯蔵タンクを備えており、該タンクが、多重船殻で囲まれた船内スペース内に形成された主タンクと、該主タンクの直上の甲板上に設けられた、該主タンクより幅の小さな箱型の頭部タンクからなり、該主タンクと該頭部タンクは該上甲板にあいた穴を介して連通していることを特徴とするLNG船。
- 該頭部タンクの幅が、該主タンクの幅の50パーセントから70パーセントの範囲である請求項1または2に記載のLNG船。
- 該頭部タンクの高さが、該頭部タンクの幅の20パーセントから60パーセントの範囲である請求項1または2に記載のLNG船。
- 該二重船殻構造と上甲板で囲まれたスペース内に左右縦隔壁を設け、それら縦隔壁で前記スペース内を3つの区画、すなわちに中央区画と左右の側部区画とに分かち、該中央区画内に前記主部タンクを形成した請求項1または2に記載のLNG船。
- 該側部区画がコンデンセートタンクに形成される請求項5に記載のLNG船。
- 該側部区画がバラスト用ディープタンクに形成される請求項5に記載のLNG船。
- LNG生産プラントを有し、LNG-FPSOとして用いられる請求項1、2,3、4、5または6に記載のLNG船。
- 該メンブレン式LNGタンクのほかに、少なくとも1つの独立式LNG貯蔵タンクを備えている請求項8に記載のLNG船。
- LNGの運搬に用いられる請求項1、2、3、4、5または7に記載のLNG船。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020147003892A KR20140056271A (ko) | 2011-08-13 | 2012-08-13 | Lng선 |
SG2014011985A SG2014011985A (en) | 2011-08-13 | 2012-08-13 | Lng ship |
US14/237,532 US9415841B2 (en) | 2011-08-13 | 2012-08-13 | LNG ship |
EP12823476.2A EP2743171A4 (en) | 2011-08-13 | 2012-08-13 | LIQUID NATURAL GAS VEHICLES |
JP2013529014A JP5715699B2 (ja) | 2011-08-13 | 2012-08-13 | Lng船 |
CN201280039573.4A CN103764494B (zh) | 2011-08-13 | 2012-08-13 | Lng船 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011177360 | 2011-08-13 | ||
JP2011-177360 | 2011-08-13 | ||
JP2011197904 | 2011-09-12 | ||
JP2011-197904 | 2011-09-12 |
Publications (1)
Publication Number | Publication Date |
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WO2013024835A1 true WO2013024835A1 (ja) | 2013-02-21 |
Family
ID=47715152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/070594 WO2013024835A1 (ja) | 2011-08-13 | 2012-08-13 | Lng船 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9415841B2 (ja) |
EP (1) | EP2743171A4 (ja) |
JP (1) | JP5715699B2 (ja) |
KR (1) | KR20140056271A (ja) |
CN (1) | CN103764494B (ja) |
SG (1) | SG2014011985A (ja) |
WO (1) | WO2013024835A1 (ja) |
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KR101637418B1 (ko) | 2014-08-01 | 2016-07-07 | 대우조선해양 주식회사 | 드릴쉽의 선체 배치구조 및 그 구조를 갖는 드릴쉽 |
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CN105818928A (zh) * | 2015-01-06 | 2016-08-03 | 江南造船(集团)有限责任公司 | 一种独立液货舱及液化气船 |
JP2018532962A (ja) * | 2015-10-26 | 2018-11-08 | アルテア エンジニアリング, インコーポレイテッドAltair Engineering, Inc. | 貯蔵タンク収納システム |
JP2019500275A (ja) * | 2016-01-12 | 2019-01-10 | エクセラレイト・リクェファクション・ソリューションズ・エルエルシー | 天然ガス液化船 |
US11493173B2 (en) | 2017-08-31 | 2022-11-08 | Altair Engineering, Inc. | Storage tank containment system |
Also Published As
Publication number | Publication date |
---|---|
US9415841B2 (en) | 2016-08-16 |
SG2014011985A (en) | 2014-06-27 |
EP2743171A4 (en) | 2016-01-20 |
CN103764494A (zh) | 2014-04-30 |
JPWO2013024835A1 (ja) | 2015-03-05 |
KR20140056271A (ko) | 2014-05-09 |
US20140224169A1 (en) | 2014-08-14 |
EP2743171A1 (en) | 2014-06-18 |
CN103764494B (zh) | 2016-08-03 |
JP5715699B2 (ja) | 2015-05-13 |
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