Anchor bolt cleaning tool

Abstract

The utility model provides an anchor bolt cleaning tool, and relates to the field of wind generating set accessories. The anchor bolt cleaning tool comprises a sleeve and a brushing piece, a containing cavity is formed in the sleeve, an opening communicated with the containing cavity is formed in one end of the sleeve, and the brushing piece is arranged in the containing cavity and detachably connected with the sleeve; the sleeve is configured to be connected with the anchor bolt in a sleeved mode through the opening, the brushing piece is driven by external force to rotate around the axis of the sleeve, and at least part of the brushing piece abuts against the peripheral side of the anchor bolt. According to the anchor bolt cleaning tool, the sleeve and the cleaning and brushing piece are arranged, the sleeve is connected to the anchor bolt in a sleeving mode and rotates, so that the cleaning and brushing piece is driven to rotate around the axis of the sleeve, at least part of the cleaning and brushing piece abuts against the peripheral side of the anchor bolt, and therefore aged and invalid oil stains on the anchor bolt are brushed away, and cleaning of the anchor bolt is achieved.

Description

Technical Field

[0001] The present application relates to the field of wind turbine accessories, and in particular to an anchor bolt cleaning tool. Background Art

[0002] Anchor bolts are used to connect the wind power tower foundation and the tower installed on the foundation to ensure the stability and safety of the wind turbine generator structure.

[0003] In the prior art, after the wind power tower is built, a layer of anti-rust oil needs to be applied on the anchor bolts, and a protective cover is installed on the anchor bolts to protect the anchor bolts and prevent them from rusting. However, since wind power towers are usually set up in places with strong winds and sand, and the temperature is high in summer, the protective cover is easily damaged or even lost under high temperature and exposure, which leads to aging and failure of the anti-rust oil, forming oil stains attached to the anchor bolts, which are difficult to remove.

[0004] Therefore, an anchor bolt cleaning tool is needed to remove the aging and ineffective oil stains on the anchor bolts. Utility Model Content

[0005] The present application provides an anchor bolt cleaning tool to solve the problem that the oil stains caused by aging and failure on the existing anchor bolts are difficult to remove.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] The anchor bolt cleaning tool provided in the present application comprises a sleeve and a cleaning brush, wherein the sleeve has a receiving cavity, one end of the sleeve has an opening communicating with the receiving cavity, and the cleaning brush is arranged in the receiving cavity and is detachably connected to the sleeve;

[0008] The sleeve is configured to be sleeved with the anchor bolt through the opening, and to drive the cleaning member to rotate around the axis of the sleeve under the driving of an external force, and the cleaning member at least partially abuts against the peripheral side of the anchor bolt.

[0009] In some possible implementations, the anchor bolt cleaning tool provided by the present application, the sleeve includes a cylinder body and a cylinder cover, and the cylinder cover is arranged at one end of the cylinder body away from the opening;

[0010] The cylinder body is provided with a slot along its extension direction, the opening is communicated with the end of the slot, the notch of the slot faces the accommodating cavity, and the cleaning member is plugged into or detached from the slot through the opening.

[0011] In some possible implementations, the anchor cleaning tool provided in the present application further includes a driving member, a connecting hole is provided at the center of the cylinder cover, and the driving member is connected to the sleeve through the connecting hole to apply external force to the sleeve to drive the cleaning member to rotate.

[0012] In some possible implementations, in the anchor cleaning tool provided in the present application, an anti-stuck hole is provided on the cylinder cover corresponding to the slot, and an end of the slot away from the opening is connected to the outside through the anti-stuck hole.

[0013] In some possible implementations, the anchor cleaning tool provided in the present application, the cleaning brush member includes an insert strip and bristles, and is arranged on one side of the insert strip along the extension direction of the insert strip, and the insert strip is plugged into or out of the slot.

[0014] In some possible implementations, the anchor cleaning tool provided in the present application also includes a fastener, a first mounting hole is provided on the cylinder, the first mounting hole is located at the bottom of the slot, the accommodating cavity is connected to the outside through the first mounting hole, the fastener is passed through the first mounting hole, and is connected to the insert strip.

[0015] In some possible implementations, in the anchor cleaning tool provided in the present application, a second mounting hole is provided on the insert strip corresponding to the first mounting hole, and the fastener is connected to the second mounting hole.

[0016] In some possible implementations, in the anchor cleaning tool provided by the present application, the length of the insert in the extension direction is less than or equal to the length of the slot in the extension direction.

[0017] In some possible implementations, the anchor cleaning tool provided in the present application has at least two cleaning brushes provided, at least two slots provided in the sleeve, and the cleaning brushes and the slots are provided in a one-to-one correspondence.

[0018] In some possible implementations, in the anchor cleaning tool provided in the present application, the driving member is an electric driving member or a manual driving member.

[0019] The anchor bolt cleaning tool provided by the present application is provided with a sleeve and a cleaning brush member located in the sleeve and detachably connected to the sleeve, so that the sleeve is sleeved on the anchor bolt and rotates, so as to drive the cleaning brush member to rotate around the axis of the sleeve and at least partially abut against the peripheral side of the anchor bolt, thereby brushing off the aged and ineffective oil stains on the anchor bolt, and cleaning the anchor bolt so as to apply new anti-rust oil, effectively extending the aging cycle of the anchor bolt and reducing the maintenance cost of the anchor bolt. Among them, since the cleaning brush member is detachably connected to the sleeve, when the anchor bolt cleaning tool completes the cleaning of the anchor bolt, the cleaning brush member can be removed from the sleeve, and the oil stains attached to the cleaning brush member and the accommodating cavity of the sleeve can be cleaned separately. The structure is simple and compact, and it is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of the anchor bolt cleaning tool provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 Bottom view of the middle anchor bolt cleaning tool;

[0023] Figure 3 for Figure 1 Top view of the center anchor bolt cleaning tool;

[0024] Figure 4 for Figure 2 Schematic diagram of the structure of the middle cleaning brush;

[0025] Figure 5 for Figure 4 Schematic diagram of the structure of the middle cleaning brush from another perspective.

[0026] Description of reference numerals:

[0027] 100-sleeve; 110-accommodating chamber; 111-opening; 120-cylinder body; 121-slot; 122-first mounting hole; 130-cylinder cover; 131-connecting hole; 132-anti-stuck hole;

[0028] 200-cleaning brush member; 210-insertion strip; 211-second mounting hole; 220-brush hair;

[0029] 300-Fasteners. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] As mentioned in the background technology, after the wind power tower is built, it is necessary to apply a layer of anti-rust oil on the anchor bolts and the nuts of the anchor bolts, and cover the anchor bolts with protective covers to protect the anchor bolts and prevent them from rusting. However, since wind power towers are usually set up in places with strong winds and sand, and the temperature is high in summer, the protective covers are easily damaged or even lost under high temperature exposure, which leads to aging and failure of the anti-rust oil, forming oil stains attached to the anchor bolts, which are difficult to remove.

[0032] Therefore, an anchor bolt cleaning tool is needed to remove the aging and ineffective oil stains on the anchor bolts.

[0033] In order to overcome the defects in the prior art, the present application provides an anchor bolt cleaning tool, which comprises a sleeve and a cleaning brush member located in the sleeve and detachably connected to the sleeve, so that the sleeve is sleeved on the anchor bolt and rotates, thereby driving the cleaning brush member to rotate around the axis of the sleeve and at least partially abut against the circumferential side of the anchor bolt, thereby brushing off the aged and failed oil stains on the anchor bolt and cleaning the anchor bolt.

[0034] The content of the utility model will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the utility model more clearly and in detail.

[0035] Reference Figure 1 and Figure 2 The anchor cleaning tool provided in the embodiment of the present application includes a sleeve 100 and a cleaning brush 200. The sleeve 100 has a accommodating cavity 110. One end of the sleeve 100 has an opening 111 connected to the accommodating cavity 110. The cleaning brush 200 is arranged in the accommodating cavity 110 and is detachably connected to the sleeve 100.

[0036] The sleeve 100 is configured to be sleeved with the anchor bolt through the opening 111 , and to drive the cleaning member 200 to rotate around the axis of the sleeve 100 under the driving force of an external force, and the cleaning member 200 at least partially abuts against the peripheral side of the anchor bolt.

[0037] It can be understood that when the anchor cleaning tool is in use, the sleeve 100 needs to be sleeved on the anchor to be cleaned. Therefore, the radial dimension of the internal accommodating cavity 110 of the sleeve 100 needs to be greater than or equal to the radial dimension of the anchor, and the axial dimension of the accommodating cavity 110 needs to be greater than or equal to the axial dimension of the anchor section to be cleaned. However, it should be noted that the size of the sleeve 100 and the size of the anchor need to be matched to avoid interference between the larger size of the sleeve 100 and other parts of the wind turbine.

[0038] A cleaning brush 200 is detachably connected to the inner side of the sleeve 100, and the cleaning brush 200 faces the axis of the sleeve 100, so that when the sleeve 100 is sleeved on the anchor bolt, the cleaning brush 200 can at least partially abut against the circumference of the anchor bolt, so that when the cleaning brush 200 rotates with the sleeve 100, the circumference of the anchor bolt is scraped and brushed, thereby brushing off the oil stains on the anchor bolt.

[0039] It can be understood that when using the present anchor bolt cleaning tool, the sleeve 100 can be first sleeved on the anchor bolt along the opening 111, and then the sleeve 100 can be rotated to allow the cleaning member 200 to scrape the anchor bolt; the sleeve 100 can also be sleeved on the anchor bolt and the sleeve 100 can be rotated at the same time to allow the cleaning member 200 to scrape the anchor bolt, and the sleeve 100 can be moved along the extension direction of the anchor bolt to obtain a better cleaning effect.

[0040] After cleaning is completed, the cleaning brush 200 can be removed from the sleeve 100 to clean the cleaning brush 200 and the inner wall of the sleeve 100 respectively to avoid oil stains adhering to the anchor cleaning tool for a long time and being difficult to remove, thereby ensuring the service life of the anchor cleaning tool.

[0041] Therefore, the anchor bolt cleaning tool provided in the present application is configured with a sleeve 100 and a cleaning brush 200 located inside the sleeve 100 and detachably connected to the sleeve 100, so that the sleeve 100 is sleeved on the anchor bolt and rotates, thereby driving the cleaning brush 200 to rotate around the axis of the sleeve 100 and at least partially abut against the circumferential side of the anchor bolt, thereby brushing off the aged and failed oil stains on the anchor bolt, achieving cleaning of the anchor bolt so that new anti-rust oil can be applied, effectively extending the aging cycle of the anchor bolt and reducing the maintenance cost of the anchor bolt.

[0042] Among them, since the cleaning brush 200 is detachably connected to the sleeve 100, when the anchor cleaning tool completes the cleaning of the anchor, the cleaning brush 200 can be removed from the sleeve 100, and the oil stains attached to the cleaning brush 200 and the accommodating cavity 110 of the sleeve 100 can be cleaned separately. The structure is simple and compact, and it is easy to clean.

[0043] Further, in some embodiments, referring to Figure 1 and Figure 2 As shown, the sleeve 100 includes a cylinder body 120 and a cylinder cover 130 , and the cylinder cover 130 is disposed at one end of the cylinder body 120 facing away from the outlet 111 .

[0044] A slot 121 is provided in the cylinder 120 along its extension direction. The opening 111 is communicated with the end of the slot 121 . The notch of the slot 121 faces the accommodating cavity 110 . The cleaning member 200 is plugged into or out of the slot 121 through the opening 111 .

[0045] By providing a slot 121 along the extension direction of the cylinder 120 and inserting the cleaning member 200, when the sleeve 100 is sleeved on the anchor bolt, the extension direction of the cleaning member 200 can be consistent with the extension direction of the anchor bolt, thereby efficiently cleaning the side of the anchor bolt.

[0046] A slot 121 is provided along this direction so that the end of the slot 121 is connected to the opening 111. When the cleaning member 200 is removed, the cleaning member 200 can be directly inserted into the slot 121 or pulled out from the opening 111, so that the structure of the anchor cleaning tool is simple and compact and easy to disassemble.

[0047] In addition, when implementing it, refer to Figures 1 to 3 As shown, a driving member (not shown) is also included. A connecting hole 131 is provided at the center of the cylinder cover 130. The driving member is connected to the sleeve 100 through the connecting hole 131 to apply external force to the sleeve 100 to drive the cleaning member 200 to rotate.

[0048] It can be understood that the anchor bolt cleaning tool needs to rotate the sleeve 100 around its own axis when in use. If the operator directly holds the sleeve 100 to rotate, it will be more laborious and difficult to operate due to the short lever arm.

[0049] In this way, a connecting hole 131 connected to the driving member can be set at the center of the cylinder cover 130, and the driving member can be used to drive the anchor bolt cleaning tool to clean the anchor bolt, with a longer force arm, more labor-saving and convenient operation.

[0050] Specifically, according to construction requirements, the driving member can be an electric driving member or a manual driving member.

[0051] The driving part is an electric driving part, such as an electric wrench, which is more convenient and efficient to operate, but the cost is relatively higher. The driving part is a manual driving part, such as an L-shaped wrench, which has a lower cost and a simpler structure, but the corresponding operation is more laborious. This application does not impose any restrictions on this.

[0052] In some embodiments, reference Figures 1 to 3 As shown, an anti-jamming hole 132 is provided on the cylinder cover 130 corresponding to the slot 121 , and one end of the slot 121 facing away from the outlet 111 is connected to the outside through the anti-jamming hole 132 .

[0053] Since the brush cleaning member 200 is plugged into the slot 121 through the opening 111, the brush cleaning member 200 is completely embedded in the sleeve 100. When it is used, it needs to be removed. At this time, there is a lack of effective fulcrum points, so an anti-jamming hole 132 can be opened at the end of the slot 121 away from the opening 111. When removing the brush cleaning member 200, a harder stick or rod can be inserted from the anti-jamming hole 132 and abutted against the end of the brush cleaning member 200, and an external force is applied to the stick or rod so that the stick or rod pushes the brush cleaning member 200 out of the slot 121, thereby realizing the removal of the brush cleaning member 200.

[0054] In addition, since there is sometimes undelete oil attached to the accommodating chamber 110, some of the oil will also adhere to the slot 121. Therefore, when the cleaning brush 200 is installed in the slot 121, the oil may be squeezed into the end of the slot 121 away from the outlet 111 by the cleaning brush 200, blocking the slot 121 and affecting the installation of the cleaning brush 200. Therefore, an anti-stuck hole 132 connected to the end of the slot 121 away from the outlet 111 is provided on the cylinder cover 130. The cleaning brush 200 can also be used to discharge the oil in the slot 121 from the anti-stuck hole 132, thereby extending the service life of the anchor cleaning tool.

[0055] In some embodiments, reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the cleaning member 200 includes an inserting strip 210 and bristles 220 , and is disposed on one side of the inserting strip 210 along the extension direction of the inserting strip 210 . The inserting strip 210 is plugged into or out of the slot 121 .

[0056] Such an arrangement can make the structure of the cleaning brush member 200 simple and compact, and increase the cleaning area of ​​the bristles 220 as much as possible, so as to improve the cleaning efficiency of the anchor cleaning tool.

[0057] At least one row of bristles 220 is arranged on one side of the insert 210. In this embodiment, two rows of bristles 220 are arranged. In other embodiments, more than two rows of bristles 220 may be arranged, and this application does not limit this. In addition, in order to ensure the cleaning effect of the bristles 220 and enable the bristles 220 to scrape off the oil stains on the anchor bolt more quickly, steel wire bristles 220 or other harder bristles 220 may be arranged.

[0058] Furthermore, in order to prevent the cleaning brush 200 from falling off from the slot 121, the anchor cleaning tool also includes a fastener 300. A first mounting hole 122 is provided on the cylinder 120. The first mounting hole 122 is located at the bottom of the slot 121. The accommodating cavity 110 is connected to the outside through the first mounting hole 122. The fastener 300 is passed through the first mounting hole 122 and is connected to the insertion strip 210.

[0059] The fastener 300 can be specifically a bolt, and the first mounting hole 122 is a threaded hole, so that the fastener 300 can be installed from the first mounting hole 122, and its end is pressed against the side of the insert 210 away from the bristles 220, so as to press the insert 210 into the slot 121 to prevent the insert 210 from falling off.

[0060] When the brush cleaning member 200 needs to be removed, the fastener 300 needs to be taken out from the first mounting hole 122 first, so as to disconnect the fastener 300 from the bristles 220 .

[0061] Further, see Figure 1 and Figure 5 As shown, a second mounting hole 211 is provided on the inserting strip 210 corresponding to the first mounting hole 122 , and the fastener 300 is connected to the second mounting hole 211 .

[0062] It can be understood that by opening a second mounting hole 211 on the inserting strip 210 corresponding to the first mounting hole 122, the fastener 300 can be further extended into the second mounting hole 211 when connected to the inserting strip 210, and while pressing the inserting strip 210 tightly against the slot 121, the movement of the inserting strip 210 along the extension direction of the slot 121 is restricted, thereby improving the stability and reliability of the connection between the cleaning member 200 and the sleeve 100.

[0063] In some embodiments, in order to prevent the insert 210 from protruding from the sleeve 100 and ensure that the anchor cleaning tool has a compact structure, the extension length of the insert 210 is less than or equal to the extension length of the slot 121 .

[0064] In another embodiment, at least two cleaning members 200 are provided, and at least two slots 121 are provided in the sleeve 100, and the cleaning members 200 are provided one-to-one with the slots 121. The cleaning members 200 can scrape the anchor bolt from at least two sides of the anchor bolt to ensure its cleaning efficiency.

[0065] In this embodiment, three slots 121 are provided in the sleeve 100, and a cleaning brush 200 is correspondingly inserted in each slot 121. In other embodiments, more than three slots 121 may be provided, and the number of cleaning brushes 200 not more than the number of slots 121 may be provided. The cleaning brushes 200 may be installed one-to-one with the slots 121, or may be less than the number of slots 121, so as to be replaced and adjusted in the slots 121 in different directions according to the use requirements.

[0066] In summary, the anchor bolt cleaning tool provided in the embodiment of the present application, by providing a sleeve 100 and a cleaning brush 200 located in the sleeve 100 and detachably connected to the sleeve 100, the sleeve 100 is sleeved on the anchor bolt and rotated, so as to drive the cleaning brush 200 to rotate around the axis of the sleeve 100 and at least partially abut against the circumferential side of the anchor bolt, thereby brushing off the aged and failed oil stains on the anchor bolt, achieving cleaning of the anchor bolt, so as to apply new anti-rust oil, effectively extending the aging cycle of the anchor bolt, and reducing the maintenance cost of the anchor bolt.

[0067] Among them, since the cleaning member 200 is detachably connected to the sleeve 100, when the anchor cleaning tool completes the cleaning of the anchor, the cleaning member 200 can be removed from the sleeve 100, and the oil stains attached to the cleaning member 200 and the accommodating cavity 110 of the sleeve 100 can be cleaned separately. The structure is simple and compact, and it is easy to clean. It should be pointed out that "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like mentioned in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to realize such features, structures or characteristics in conjunction with other embodiments that are explicitly or implicitly described.

[0068] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0069] It should be easily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0070] In addition, spatially relative terms, such as "below," "below," "below," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An anchor bolt cleaning tool, characterized in that: It comprises a sleeve and a cleaning brush, wherein the sleeve has a receiving cavity, one end of the sleeve has an opening communicating with the receiving cavity, the cleaning brush is arranged in the receiving cavity and is detachably connected to the sleeve; The sleeve is configured to be sleeved with the anchor bolt through the opening, and to drive the cleaning member to rotate around the axis of the sleeve under the driving of an external force, and the cleaning member at least partially abuts against the peripheral side of the anchor bolt.

2. The anchor bolt cleaning tool according to claim 1, characterized in that: The sleeve comprises a cylinder body and a cylinder cover, wherein the cylinder cover is arranged at one end of the cylinder body away from the opening; The cylinder body is provided with a slot along its extension direction, the opening is communicated with the end of the slot, the notch of the slot faces the accommodating cavity, and the cleaning member is plugged into or detached from the slot through the opening.

3. The anchor bolt cleaning tool according to claim 2, characterized in that: It also includes a driving member. A connecting hole is provided at the center of the cylinder cover. The driving member is connected to the sleeve through the connecting hole to apply external force to the sleeve to drive the cleaning member to rotate.

4. The anchor bolt cleaning tool according to claim 2, characterized in that: An anti-stuck hole is arranged on the cylinder cover corresponding to the slot, and an end of the slot away from the opening is connected to the outside through the anti-stuck hole.

5. The anchor bolt cleaning tool according to any one of claims 2 to 4, characterized in that: The brush cleaning member comprises an inserting strip and bristles, and is arranged on one side of the inserting strip along the extending direction of the inserting strip, and the inserting strip is plugged into or out of the insertion slot.

6. The anchor bolt cleaning tool according to claim 5, characterized in that: It also includes a fastener, a first mounting hole is provided on the cylinder, the first mounting hole is located at the bottom of the slot, the accommodating cavity is connected with the outside through the first mounting hole, the fastener is passed through the first mounting hole and connected to the insert.

7. The anchor bolt cleaning tool according to claim 6, characterized in that: The inserting strip is provided with a second mounting hole corresponding to the first mounting hole, and the fastener is connected to the second mounting hole.

8. The anchor bolt cleaning tool according to claim 5, characterized in that: The length of the inserting strip in the extending direction is less than or equal to the length of the slot in the extending direction.

9. The anchor bolt cleaning tool according to any one of claims 2 to 4, characterized in that: At least two cleaning members are provided, at least two slots are provided in the sleeve, and the cleaning members are provided in a one-to-one correspondence with the slots.

10. The anchor bolt cleaning tool according to claim 3, characterized in that: The driving member is an electric driving member or a manual driving member.

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