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1. 发明授权

US06884467B2 Method for simultaneously protecting carbon-containing components against catalytic oxidation and high temperature non-catalytic oxidation 失效
标题翻译：同时保护含碳成分免受催化氧化和高温非催化氧化的方法
公开(公告)号：US06884467B2
公开(公告)日：2005-04-26
申请号：US10223946
申请日：2002-08-20
申请人： Terence B. Walker , Ilan Golecki , Laurie A. Booker
发明人： Terence B. Walker , Ilan Golecki , Laurie A. Booker
IPC分类号： F16D65/12 , C04B35/52 , C04B41/52 , C04B41/89 , C09K3/14 , C09K15/02 , F16D69/02 , B32B9/00
CPC分类号： C04B41/009 , C04B41/52 , C04B41/89 , C04B2111/00362 , F16D69/023 , F16D2250/0038 , Y10T428/24975 , Y10T428/26 , Y10T428/30 , C04B41/5092 , C04B41/4535 , C04B41/5058 , C04B41/5064 , C04B41/5094 , C04B41/5006 , C04B41/522 , C04B35/83
摘要： Coated articles (19) that comprise components, made of carbon fiber or carbon-carbon composites which may be configured, for example, as aircraft landing system brake discs. The components (10) are coated with a system that includes a phosphorus-containing undercoating (11) having a specified formulation and a boron-containing overcoating (12) having specified formulation. The coated articles of the invention, e.g., aircraft brake discs, are protected against catalytic oxidation when the article is subjected to temperatures of 800° C. (1472° F.) or greater. Also, a method of protecting a component made of a carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation (e.g., catalyzed by de-icer compositions) and high temperature non-catalytic oxidation.
摘要翻译：包括由碳纤维或碳 - 碳复合材料制成的组件的涂层制品（19），其可被配置为例如飞机着陆系统制动盘。组分（10）涂覆有包含具有特定制剂的含磷底涂层（11）和具有特定配方的含硼外涂层（12）的体系。当制品经受800℃（1472°F）或更高的温度时，本发明的涂覆制品，例如飞机制动盘，被保护以防止催化氧化。而且，同时防止由碳纤维或碳 - 碳复合材料制成的部件同时进行催化氧化（例如由除冰剂组合物催化）和高温非催化氧化的方法。

2. 发明授权

US07118805B2 High temperature oxidation inhibitors for carbon-carbon friction materials 有权
标题翻译：用于碳 - 碳摩擦材料的高温氧化抑制剂
公开(公告)号：US07118805B2
公开(公告)日：2006-10-10
申请号：US11049691
申请日：2005-02-04
申请人： Terence B. Walker , Ilan Golecki , Laurie A. Booker
发明人： Terence B. Walker , Ilan Golecki , Laurie A. Booker
IPC分类号： B32B9/00
CPC分类号： C04B41/009 , C04B41/52 , C04B41/89 , C04B2111/00362 , F16D69/023 , F16D2250/0038 , Y10T428/24975 , Y10T428/26 , Y10T428/30 , C04B41/5092 , C04B41/4535 , C04B41/5058 , C04B41/5064 , C04B41/5094 , C04B41/5006 , C04B41/522 , C04B35/83
摘要： Coated articles (19) that comprise components, made of carbon fiber or carbon-carbon composites which may be configured, for example, as aircraft landing system brake discs. The components (10) are coated with a system that includes a phosphorus-containing undercoating (11) having a specified formulation and a boron-containing overcoating (12) having specified characteristics. The coated articles of the invention, e.g., aircraft brake discs, are protected against catalytic oxidation when the article is subjected to temperatures of 800° C. (1472° F.) or greater. Also, a method of protecting a component made of a carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation (e.g., catalyzed by de-icer compositions) and high temperature non-catalytic oxidation.
摘要翻译：包括由碳纤维或碳 - 碳复合材料制成的组件的涂层制品（19），其可被配置为例如飞机着陆系统制动盘。组分（10）涂覆有包含具有特定配方的含磷底涂层（11）和具有特定特征的含硼外涂层（12）的体系。当制品经受800℃（1472°F）或更高的温度时，本发明的涂覆制品，例如飞机制动盘，被保护以防止催化氧化。而且，同时防止由碳纤维或碳 - 碳复合材料制成的部件同时进行催化氧化（例如由除冰剂组合物催化）和高温非催化氧化的方法。

3. 发明授权

US06913821B2 Fluidizing oxidation protection systems 失效
标题翻译：流化氧化保护系统
公开(公告)号：US06913821B2
公开(公告)日：2005-07-05
申请号：US10622257
申请日：2003-07-18
申请人： Ilan Golecki , Terence B. Walker , Laurie A. Booker
发明人： Ilan Golecki , Terence B. Walker , Laurie A. Booker
IPC分类号： C04B41/87 , C04B41/50 , C04B41/52 , C04B41/85 , C04B41/86 , C04B41/89 , F16D69/00 , F16D69/02 , B32B9/00 , B05D3/02
CPC分类号： C04B41/009 , C04B41/5022 , C04B41/5092 , C04B41/52 , C04B41/85 , C04B41/86 , C04B41/89 , C04B2111/00362 , F16D69/023 , F16D2069/004 , F16D2200/0047 , F16D2250/0038 , Y10T428/263 , Y10T428/266 , Y10T428/2918 , Y10T428/30 , C04B41/5058 , C04B41/5064 , C04B41/5094 , C04B35/83 , C04B41/4535 , C04B41/455 , C04B41/4531 , C04B41/5059
摘要： Carbon composite components (1, 11, 22, 30), which may be aircraft brake discs, heat exchanger cores, and so on, are covered by protective coating 32. Component (1, 11, 22, 30) is immersed in liquid bath precursor of fluidized glass (step 55). After immersion step, glass-coated component (1, 11, 22, 30) is removed and annealed. Heat treatment gradually increases temperature to 250-350° C. at the rate of 1-2° C. per minute (step 60). Heat treatment is followed by soak at temperature of 250-350° C. for 1-10 hours (step 65). Temperature is then increased to 550-650° C. (step 70). Temperature is maintained at 550-650° C. for 1-10 hours (step 75). After completion of second prolonged heat treatment, the component is cooled until reaching room temperature (step 80). Upon completion of the annealing step, the fluidized glass coating converts to solid glass coating (32) enveloping and forming a protective barrier against undesirable oxidation of the C—C component (1, 11, 22, 30). For application to thin-gauge composites, the glass precursor components contain 20-60 weight-% water, 25-50 weight-% phosphoric acid, 2-20 weight-% alkali metal hydroxide, 1-10 weight-% manganese phosphate, 1-10 weight-% boron nitride, 0-5 weight-% elemental boron, and 10-28 weight-% boron carbide.
摘要翻译：可以是飞机制动盘，热交换器芯等的碳复合材料部件（1,11,22,30）被保护涂层32覆盖。将组分（1,11,22,30）浸入流化玻璃的液浴前体（步骤55）中。在浸渍步骤之后，除去玻璃涂层组分（1，11，22，30）并进行退火。热处理以每分钟1-2℃的速度逐渐将温度升至250-350℃（步骤60）。热处理之后，在250-350℃的温度下浸泡1-10小时（步骤65）。然后将温度升高至550-650℃（步骤70）。温度保持在550-650℃1-10小时（步骤75）。在第二次长时间热处理完成后，将组分冷却至达到室温（步骤80）。在退火步骤完成后，流化玻璃涂层转化为固体玻璃涂层（32），其包裹并形成防止C-C组分（1,11,22,30）的不希望氧化的保护屏障。为了应用于薄规格复合材料，玻璃前体组分含有20-60重量％的水，25-50重量％的磷酸，2-20重量％的碱金属氢氧化物，1-10重量％的磷酸锰，1 -10重量％的氮化硼，0-5重量％的元素硼和10-28重量％的碳化硼。

4. 发明授权

US07501181B2 Bi-or tri-layer anti-oxidation system for carbon composite brakes 有权
标题翻译：用于碳复合制动器的双层或三层抗氧化系统
公开(公告)号：US07501181B2
公开(公告)日：2009-03-10
申请号：US11377446
申请日：2006-03-17
申请人： Terence B. Walker , Laurie A. Booker , Michelle L. Shreve , Manuel G. Koucouthakis
发明人： Terence B. Walker , Laurie A. Booker , Michelle L. Shreve , Manuel G. Koucouthakis
IPC分类号： B32B9/00
CPC分类号： C04B41/89 , C04B41/009 , C04B41/52 , C04B2111/00362 , F16D69/023 , F16D2250/0038 , Y10T428/30 , C04B41/5006 , C04B41/5092 , C04B41/5059 , C04B41/5089 , C04B35/83
摘要： Coated article, e.g., a brake disc, comprising a carbon-carbon composite component or a carbon-carbon-silicon carbide component coated at least with a phosphorus-containing antioxidant undercoating, the undercoating being covered by a silicon carbide particle-containing overcoating of alkali or alkaline earth metal silicate, pH modifier, and silicon carbide particles. Also, method of protecting a carbon-carbon composite brake disc or a carbon-carbon-silicon carbide composite brake disc against oxidation, by: coating the composite brake disc with a first phosphoric acid-based penetrant system; curing the penetrant coating at a temperature of 200° C. or above to form a first coating on the composite brake disc; applying the ceramic coating composition of claim 1 over the first coating and curing the ceramic coating at a temperature below 200° C. to form a second coating on the composite brake disc; and optionally coating the coated composite brake disc so obtained with a second phosphoric acid-based penetrant system; and curing the penetrant coating at a temperature of 200° C. or above to form a third coating on the composite brake disc.
摘要翻译：涂覆制品，例如制动盘，其包含至少涂覆有含磷抗氧化剂底涂层的碳 - 碳复合组分或碳 - 碳 - 碳化硅组分，底涂层被含碳化硅颗粒的碱性外涂层或碱土金属硅酸盐，pH调节剂和碳化硅颗粒。另外，通过以第一磷酸系渗透系统涂覆复合制动盘，保护碳 - 碳复合制动盘或碳 - 碳 - 碳化硅复合制动盘抵抗氧化的方法; 在200℃或更高的温度下固化渗透剂涂层以在复合制动盘上形成第一涂层; 将权利要求1的陶瓷涂料组合物涂覆在第一涂层上并在低于200℃的温度下固化陶瓷涂层，以在复合制动盘上形成第二涂层; 并且可选地用第二磷酸基渗透系统涂覆如此获得的涂覆的复合制动盘; 并在200℃或更高的温度下固化渗透剂涂层，以在复合制动盘上形成第三涂层。

5. 发明授权

US07105141B2 Process and apparatus for the manufacture of carbon microballoons 失效
标题翻译：用于制造碳微球的工艺和设备
公开(公告)号：US07105141B2
公开(公告)日：2006-09-12
申请号：US10223936
申请日：2002-08-20
申请人： Terence B. Walker , Laurie A. Booker
发明人： Terence B. Walker , Laurie A. Booker
IPC分类号： C01B31/02
CPC分类号： B01J19/0053 , B01J19/006 , B01J19/02 , B01J2219/00768 , B01J2219/0277 , B01J2219/0286 , C01B32/05
摘要： This invention provides a stepped heating cycle for the pre-treatment of phenolic microballoons prior to carbonization thereof, wherein the heating cycle comprises the steps of sequentially: gradually elevating the temperature of the microballoons to a temperature in the range 100° C.–170° C.; holding the microballoons at the elevated temperature for 1–24 hours; and gradually cooling the microballoons. This invention also provides a heat-dissipation reactor (11, 21, 31) which comprises a walled reaction chamber having a bottom and no top, the reaction chamber being fitted with high thermal conductivity inserts. When used in accordance with this invention (61), the volume within the walls of the reaction chamber is charged with phenolic resin microballoons. In a preferred embodiment, the reaction chamber (11, 21) is subdivided into a plurality of subchambers by a vertical grid of aluminum plates (19, 29). In this embodiment, about half or more of the wall area of each subchamber comprises aluminum and a top edge (17) of the aluminum wall material communicates with atmosphere above the reaction chamber.
摘要翻译：本发明提供了在碳化之前预处理酚醛微球的阶梯式加热循环，其中加热循环包括以下步骤：将微球的温度逐渐升高到100℃-170℃ C。; 将微球保持在高温下1-24小时; 并逐渐冷却微球。本发明还提供一种散热反应器（11,21,31），其包括具有底部且没有顶部的壁反应室，所述反应室配有高导热性插入物。当根据本发明（61）使用时，反应室壁内的体积充满酚醛树脂微球。在优选实施例中，通过铝板（19,29）的垂直格栅将反应室（11,21）细分成多个子室。在该实施例中，每个子室的壁面积的大约一半或更多包括铝，并且铝壁材料的顶部边缘（17）与反应室上方的气氛相通。

6. 发明授权

US06726753B2 Coated carbon brake disc materials 失效
标题翻译：涂碳制动盘材料
公开(公告)号：US06726753B2
公开(公告)日：2004-04-27
申请号：US10210420
申请日：2002-07-30
申请人： Manuel G. Koucouthakis , Michelle L. Shreve , Ken A. Thompson , Michael N. Spross , Laurie A. Booker , Terence B. Walker
发明人： Manuel G. Koucouthakis , Michelle L. Shreve , Ken A. Thompson , Michael N. Spross , Laurie A. Booker , Terence B. Walker
IPC分类号： C09K1502
CPC分类号： C04B41/009 , C04B41/5092 , C04B41/85 , C04B2111/00362 , F16D69/02 , F16D69/023 , F16D2250/0038 , Y10T428/24992 , C04B41/53 , C04B2103/54 , C04B35/83
摘要： Antioxidant coating compositions containing 10-75 wt % H2O, 20-65 wt % H3PO4, 0.1-20 wt % alkali metal mono-, di-, or tri-basic phosphate, 0-2 wt % hydrated boron oxide, 0-18 wt % KH2PO4, 3-10 wt % of a transition metal oxide, and 0-20 wt % hydrated manganese phosphate, 0-25 wt % Al(H2PO4)3, and 0-10 wt % Zn3(PO4)2, provided that at least one of Al(H2PO4)3, Zn3(PO4)2, and hydrated manganese phosphate is present. Also, brake discs made from carbon composite articles having their surface treated with certain antioxidant coatings. During a manufacturing process, carbon matrix 15 of brake disc 11 is covered on its outer and inner edges with antioxidant layers 19 and portions of the working surface of brake disc 11 may also be covered with antioxidant layers 13, potentially decreasing the fitness of the brake disc for service. In accordance with this invention, brake disc 12 is manufactured from brake disc 11 by the removal from its working surface of antioxidant layers 13.
摘要翻译：含有10-75重量％H 2 O，20-65重量％H 3 PO 4，0.1-20重量％碱金属单 - ，二 - 或三 - 碱性磷酸盐，0-2重量％水合氧化硼，0-18重量％％KH 2 PO 4，3-10重量％过渡金属氧化物和0-20重量％水合磷酸锰，0-25重量％Al（H 2 PO 4）3和0-10重量％Zn 3（PO 4）2，条件是在存在Al（H 2 PO 4）3，Zn 3（PO 4）2和水合磷酸锰中的至少一种。而且，由碳复合材料制成的制动盘，其表面用某些抗氧化涂层处理。在制造过程中，制动盘11的碳基体15在其外边缘和内边缘上被抗氧化剂层19覆盖，并且制动盘11的工作表面的部分也可被抗氧化剂层13覆盖，潜在地降低制动器的适用性光盘服务。根据本发明，制动盘12通过从其抗氧化层13的工作表面移除而由制动盘11制造。

7. 发明授权

US07766130B2 Wear pin assemblies for carbon-carbon composite brake systems 失效
标题翻译：用于碳 - 碳复合制动系统的销钉组件
公开(公告)号：US07766130B2
公开(公告)日：2010-08-03
申请号：US10993300
申请日：2004-11-19
申请人： Terence B. Walker , Akshay Waghray , Laurie A. Booker
发明人： Terence B. Walker , Akshay Waghray , Laurie A. Booker
IPC分类号： F16D66/02 , F16D65/00
CPC分类号： F16D66/02
摘要： Apparatus including a carbon-carbon composite pressure plate (32, 42) having a friction surface (33, 43) on one side thereof, a non-friction surface (37, 47) on the opposite side thereof, and a body (39, 49) between said surfaces. A wear pin housing (36, 46) containing a wear pin retainer (35, 45) is located in the pressure plate body (39, 49), the wear pin housing opening to the non-friction surface (37, 47) but not opening to the friction surface (33, 43). A wear pin (31), preferably made of carbon-carbon composite material, is located in the wear pin retainer (35, 45). The wear pin retainer (35, 45), which may be made of carbon-carbon composite material, is held in place in the wear pin housing (36, 46) by the interaction of threading in the wear pin housing (36, 36) and threading in the wear pin retainer (35, 45) and optionally also by a carbonizable resin adhesive located between the wear pin housing threading and the wear pin retainer threading.
摘要翻译：一种装置，包括：碳 - 碳复合压板（32,42），其一侧具有摩擦面（33,43），在其相对侧具有非摩擦面（37,47），以及主体 49）。包含耐磨销保持架（35,45）的耐磨销外壳（36,46）位于压板本体（39,49）中，耐磨销外壳通向非摩擦表面（37,47）而不是通向摩擦表面（33,43）。优选由碳 - 碳复合材料制成的耐磨销（31）位于耐磨销保持器（35,45）中。可由碳 - 碳复合材料制成的耐磨销保持器（35,45）通过磨损销外壳（36,36）中的螺纹的相互作用而保持在耐磨销外壳（36,46）中的适当位置，以及在磨损销保持器（35,45）中的螺纹连接以及可选地通过位于磨损销外壳螺纹和耐磨销保持器螺纹之间的可碳化树脂粘合剂。

8. 发明申请

US20100143214A1 APPARATUS FOR THE MANUFACTURE OF CARBON MICROBALLOONS 失效
标题翻译：碳微生物制造设备
公开(公告)号：US20100143214A1
公开(公告)日：2010-06-10
申请号：US11495707
申请日：2006-07-31
申请人： Terence B. Walker , Laurie A. Booker
发明人： Terence B. Walker , Laurie A. Booker
IPC分类号： B01J19/02
CPC分类号： B01J19/0053 , B01J19/006 , B01J19/02 , B01J2219/00768 , B01J2219/0277 , B01J2219/0286 , C01B32/05
摘要： This invention provides a stepped heating cycle for the pre-treatment of phenolic microballoons prior to carbonization thereof, wherein the heating cycle comprises the steps of sequentially: gradually elevating the temperature of the microballoons to a temperature in the range 100° C.-170° C.; holding the microballoons at the elevated temperature for 1-24 hours; and gradually cooling the microballoons. This invention also provides a heat-dissipation reactor (11, 21, 31) which comprises a walled reaction chamber having a bottom and no top, the reaction chamber being fitted with high thermal conductivity inserts. When used in accordance with this invention (61), the volume within the walls of the reaction chamber is charged with phenolic resin microballoons. In a preferred embodiment, the reaction chamber (11, 21) is subdivided into a plurality of subchambers by a vertical grid of aluminum plates (19, 29). In this embodiment, about half or more of the wall area of each subchamber comprises aluminum and a top edge (17) of the aluminum wall material communicates with atmosphere above the reaction chamber.
摘要翻译：本发明提供了在碳化之前预处理酚醛微球的阶梯式加热循环，其中加热循环包括以下步骤：将微球的温度逐渐升高到100℃-170℃ C。; 将微球保持在高温下1-24小时; 并逐渐冷却微球。本发明还提供了一种散热反应器（11,21,31），其包括具有底部且没有顶部的壁反应室，所述反应室配有高导热性插入物。当根据本发明（61）使用时，反应室壁内的体积充满酚醛树脂微球。在优选实施例中，通过铝板（19,29）的垂直格栅将反应室（11,21）细分成多个子室。在该实施例中，每个子室的壁面积的大约一半或更多包括铝，并且铝壁材料的顶部边缘（17）与反应室上方的气氛相通。

9. 发明申请

US20070218208A1 Bi- or tri- layer anti-oxidation system for carbon composite brakes 有权
标题翻译：用于碳复合制动器的双层或三层抗氧化系统
公开(公告)号：US20070218208A1
公开(公告)日：2007-09-20
申请号：US11377446
申请日：2006-03-17
申请人： Terence B. Walker , Laurie A. Booker , Michelle L. Shreve , Manuel G. Koucouthakis
发明人： Terence B. Walker , Laurie A. Booker , Michelle L. Shreve , Manuel G. Koucouthakis
IPC分类号： B05D3/10 , B05D1/36 , C04B9/02
CPC分类号： C04B41/89 , C04B41/009 , C04B41/52 , C04B2111/00362 , F16D69/023 , F16D2250/0038 , Y10T428/30 , C04B41/5006 , C04B41/5092 , C04B41/5059 , C04B41/5089 , C04B35/83
摘要： Coated article, e.g., a brake disc, comprising a carbon-carbon composite component or a carbon-carbon-silicon carbide component coated at least with a phosphorus-containing antioxidant undercoating, the undercoating being covered by a silicon carbide particle-containing overcoating of alkali or alkaline earth metal silicate, pH modifier, and silicon carbide particles. Also, method of protecting a carbon-carbon composite brake disc or a carbon-carbon-silicon carbide composite brake disc against oxidation, by: coating the composite brake disc with a first phosphoric acid-based penetrant system; curing the penetrant coating at a temperature of 200° C. or above to form a first coating on the composite brake disc; applying the ceramic coating composition of claim 1 over the first coating and curing the ceramic coating at a temperature below 200° C. to form a second coating on the composite brake disc; and optionally coating the coated composite brake disc so obtained with a second phosphoric acid-based penetrant system; and curing the penetrant coating at a temperature of 200° C. or above to form a third coating on the composite brake disc.
摘要翻译：涂覆制品，例如制动盘，其包含至少涂覆有含磷抗氧化剂底涂层的碳 - 碳复合组分或碳 - 碳 - 碳化硅组分，底涂层被含碳化硅颗粒的碱性外涂层或碱土金属硅酸盐，pH调节剂和碳化硅颗粒。另外，通过以第一磷酸系渗透系统涂覆复合制动盘，保护碳 - 碳复合制动盘或碳 - 碳 - 碳化硅复合制动盘抵抗氧化的方法; 在200℃或更高的温度下固化渗透剂涂层以在复合制动盘上形成第一涂层; 将权利要求1的陶瓷涂料组合物涂覆在第一涂层上并在低于200℃的温度下固化陶瓷涂层，以在复合制动盘上形成第二涂层; 并且可选地用第二磷酸基渗透系统涂覆如此获得的涂覆的复合制动盘; 并在200℃或更高的温度下固化渗透剂涂层，以在复合制动盘上形成第三涂层。

10. 发明授权

US06455159B1 Oxidation protection for carbon/carbon composites and graphites 有权
标题翻译：碳/碳复合材料和石墨的氧化保护
公开(公告)号：US06455159B1
公开(公告)日：2002-09-24
申请号：US09507414
申请日：2000-02-18
申请人： Terence B. Walker , Laurie A. Booker
发明人： Terence B. Walker , Laurie A. Booker
IPC分类号： B32B900
CPC分类号： C04B41/009 , C04B41/5015 , C04B41/85 , F16D69/023 , Y10T428/292 , Y10T428/30 , Y10T428/8305 , C04B41/5016 , C04B35/522 , C04B35/83
摘要： The invention provides for oxidatively resistant carbon/carbon composites and other graphite-like material, a method for the preparation of these materials, and their use in high temperature applications, preferably in brakes for airplanes. The carbon/carbon composite or graphite-like material, which is resistant to oxidation at high temperatures comprises a fiber-reinforced carbon/carbon composite or graphite in contact with a phosphoric acid based penetrant salt solution which contains the ions formed from the combination of the following: 10-80 wt % H2O, 20-70 wt % H3PO4, 0-25 wt % MnHPO4.1.6H2O, 0-30 wt % Al(H2PO4)3, 0-2 wt % B2O3, 0-10 wt % Zn3(PO4)2 and 0.1-25 wt % alkali metal mono-, di-, or tri-basic phosphate.
摘要翻译：本发明提供了耐氧化碳/碳复合材料和其它石墨状材料，这些材料的制备方法及其在高温应用中的应用，优选用于飞机制动器。耐高温氧化的碳/碳复合材料或类似石墨的材料包括与磷酸基渗透盐溶液接触的纤维增强碳/碳复合材料或石墨，所述磷酸基渗透盐溶液含有由以下：10-80wt％H 2 O，20-70wt％H 3 PO 4，0-25wt％MnHPO 4·1.6H 2 O，0-30wt％Al（H 2 PO 4）3,0-2wt％B 2 O 3，0-10wt％Zn 3 （PO4）2和0.1-25重量％碱金属的单，二或三碱式磷酸盐。

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