River ecological floating bed

Abstract

The utility model belongs to the technical field of river regulation, and discloses a river ecological floating bed. The riverway ecological floating bed comprises a floating bed mechanism, a planting mechanism and a limiting mechanism. Wherein the floating bed mechanism comprises at least one floating plate main body, and the floating plate main body is provided with a mounting hole; the planting mechanism comprises at least one planting cylinder, the planting cylinders are arranged in the mounting holes of the floating plate body in a one-to-one correspondence mode, and the planting cylinders are used for planting aquatic plants; the limiting mechanism comprises at least one limiting cylinder, the limiting cylinder is arranged on the floating plate main body and is close to the periphery of the mounting hole, and the limiting cylinder is used for limiting and fixing the planting mechanism, so that the fixing of the planting cylinder and the building stability of the floating bed can be improved, and the problem of displacement or toppling caused by water flow fluctuation is prevented; the normal growth of the aquatic plants is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to river harnessing technical field especially relates to a river ecological floating bed. BACKGROUND

[0002] River ecological floating bed as an innovative ecological restoration technology has been widely used in river harnessing and water quality improvement field in recent years. In the natural river environment, the use of river ecological floating bed makes the aquatic plants absorb the nutrients in the water such as nitrogen, phosphorus, etc. through the root system, releases oxygen at the same time, promotes the microbial activity in the water body, forms a complex ecological system, is beneficial to river harnessing and water quality improvement.

[0003] In the existing river ecological floating bed technology, the fixing and limiting of the planting cylinder often depend on the rope binding mode, which can realize the fixing of the planting cylinder to a certain extent. However, this design ignores the influence of biological reaction on the efficiency of the floating bed, and a series of deficiencies are exposed in the actual application, especially when facing the complex and changeable river flow environment, the traditional fixing mode is often difficult to resist the continuous impact of the water flow, which is easy to cause the loosening or even falling off of the planting cylinder, which not only affects the normal growth of the aquatic plants, but also may cause adverse effects on the ecological balance of the river.

[0004] Therefore, there is an urgent need for a river ecological floating bed to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a river ecological floating bed, which can improve the fixing of the planting cylinder and the stability of the floating bed construction, prevent the displacement or dumping caused by water flow fluctuation, and ensure the normal growth of aquatic plants.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The river ecological floating bed comprises:

[0008] The floating bed mechanism comprises at least one floating plate body, and the floating plate body is provided with a mounting hole;

[0009] The planting mechanism comprises at least one planting cylinder, the planting cylinder is arranged in the mounting hole of the floating plate body in one-to-one correspondence, and the planting cylinder is used for planting aquatic plants;

[0010] The limiting mechanism comprises at least one limiting cylinder, the limiting cylinder is arranged on the floating plate body and close to the outer periphery of the mounting hole, and the limiting cylinder is used for limiting and fixing the planting mechanism.

[0011] As preferred, the outer periphery of the planting cylinder is provided with a fixing lug, the fixing lug is provided with a sliding hole, the fixing lug is slidably connected to the limiting cylinder through the sliding hole, the outer peripheral wall of the limiting cylinder is provided with a limiting ball, the limiting ball can expand or contract along the radial direction of the limiting cylinder, and the limiting ball can expand to limit the fixing lug or contract to allow the fixing lug to be slidably connected to the limiting cylinder.

[0012] As preferred, the limiting mechanism further comprises a sliding rod, one end of the sliding rod is slidably arranged in the inner cavity of the limiting cylinder, the sliding rod is in contact with the limiting ball, the outer periphery of the sliding rod is provided with a stepped groove, and the limiting ball is slidably connected to the sliding rod so that the limiting ball is slidably contracted into the stepped groove.

[0013] As preferred, the limiting mechanism further comprises a push-pull piece, the push-pull piece is arranged on one side of the limiting cylinder, and the push-pull piece is fixedly connected to the other end of the sliding rod, the push-pull piece is slidably connected to the floating plate body along the axial direction of the limiting cylinder to drive the sliding rod to slide along the limiting cylinder.

[0014] As preferred, the floating plate body is provided with a sliding groove, the push-pull piece is provided with a sliding block, and the sliding block is slidably connected to the sliding groove.

[0015] As preferred, the end of the push-pull piece extending out of the floating plate body is provided with a pull ring.

[0016] As preferred, the inner cavity wall of the limiting cylinder is provided with a groove to form a limiting groove, the limiting groove is provided with an elastic piece, the elastic piece is sleeved on the sliding rod and the two ends of the elastic piece are fixed to any groove wall along the axial direction of the limiting groove and the outer peripheral wall of the sliding rod respectively.

[0017] As preferred, the bottom of the planting cylinder is provided with a plurality of through holes, and the through holes are used to communicate the river environment inside and outside the planting cylinder.

[0018] As preferred, the outer periphery of the floating plate body is further provided with a lap joint portion, and the lap joint portions of two adjacent floating plate bodies are connected to each other.

[0019] As preferred, the floating bed mechanism further comprises a protective net, and the protective net is arranged below the floating plate body to block the contact between aquatic organisms and aquatic plants in the planting cylinder.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model provides a river ecological floating bed, not only can plant aquatic organism through planting tube to complete the absorption of nitrogen, phosphorus and other nutrients in river, can release oxygen to water, realize the promotion to the microbial activity in river, formed good ecological system, is favorable for river management and water quality improvement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the isometric view of the river ecological floating bed provided by the utility model embodiment;

[0023] Figure 2 It is the partial sectional view of the river ecological floating bed provided by the utility model embodiment;

[0024] Figure 3 It is the isometric view of the planting tube provided by the utility model embodiment;

[0025] Figure 4 It is the sectional view of the limiting mechanism provided by the utility model embodiment.

[0026] In the drawing:

[0027] 10, floating bed mechanism;11, floating plate main part;111, mounting hole;112, sliding groove;113, butt joint plate;12, lap joint portion;13, protective net;

[0028] 20, planting mechanism;21, planting tube;211, through hole;22, fixed lug;221, slide hole;

[0029] 30, limiting mechanism;31, limiting cylinder;311, limiting groove;32, limiting ball;33, sliding rod;331, step groove;332, limiting protrusion;34, push-pull piece;341, sliding block;342, connecting portion;35, elastic piece;36, pull ring. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0031] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be direct connection, also can pass through the indirect connection of intermediate medium, can be two element internal communication or two element mutual action relation.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, also can include that the first and second features are not in direct contact but contact through another feature between them.Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the embodiment, the orientation or position relationship of the terms "up", "down", "left", "right", etc.is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0034] The following refers to Figures 1 to 4 The utility model provides a river ecological floating bed is introduced.

[0035] The embodiment provides a river ecological floating bed, which is applied in a river, absorbs nutrients in water by planting aquatic plants, releases oxygen at the same time, promotes microbial activity in water, and is used for river management and water quality improvement.

[0036] Please refer to Figure 1 And Figure 2In particular, the river ecological floating bed includes a floating bed mechanism 10, a planting mechanism 20 and a limiting mechanism 30. The floating bed mechanism 10 includes at least one floating plate body 11, and the floating plate body 11 is provided with a mounting hole 111; the planting mechanism 20 includes at least one planting cylinder 21, and the planting cylinder 21 is arranged in the mounting hole 111 of the floating plate body 11 one by one, and the planting cylinder 21 is used for planting aquatic plants; the limiting mechanism 30 includes at least one limiting cylinder 31, and the limiting cylinder 31 is arranged on the floating plate body 11 and close to the outer periphery of the mounting hole 111, and the limiting cylinder 31 is used for limiting and fixing the planting mechanism 20.

[0037] The river ecological floating bed in the embodiment can not only absorb the nutrients such as nitrogen and phosphorus in the river by planting aquatic organisms in the planting cylinder 21, but also release oxygen into the water to promote the activity of microorganisms in the river, form a good ecological system, and be beneficial to river management and water quality improvement. Moreover, the planting cylinder 21 is limited and fixed on the floating plate body 11 by the limiting mechanism 30, so that the planting cylinder 21 can be quickly disassembled and assembled, and the problems of displacement or dumping of the planting cylinder 21 caused by water flow fluctuation during use are avoided, thereby ensuring the normal growth of aquatic plants and the stability of the formed ecological system.

[0038] Please continue to refer to Figure 1 and Figure 2 In the embodiment, the floating plate body 11 in the floating bed mechanism 10 is provided with a plurality of floating plate bodies 11, and the plurality of floating plate bodies 11 provide a stable growth platform for aquatic plants, which is more conducive to the reliability of the river ecological floating bed in river management and water quality improvement. Of course, the specific number of the floating plate body 11 is determined by the size of the river and the demand of the ecological system to form a stable ecological system.

[0039] In particular, the floating plate body 11 includes two butt plates 113, and the two butt plates 113 are symmetrically connected to form the floating plate body 11, and the two butt plates 113 are more convenient for the arrangement of the limiting mechanism 30 and the planting cylinder 21. Specifically, the mounting hole 111 can also be divided into two semicircular holes to facilitate processing and splicing.

[0040] Alternatively, the two butt plates 113 are connected by clamping, inserting, bolting or other fixing methods to realize the fixed connection between the two butt plates 113. Of course, the plurality of floating plate bodies 11 can also be connected by clamping, inserting, bolting or other fixing methods, which will not be described here.

[0041] Further, the outer periphery of the floating plate body 11 is further provided with a lap joint portion 12, the lap joint portions 12 of two adjacent floating plate bodies 11 are connected to each other, and the provision of the lap joint portion 12 is beneficial to increase the connection area between the two adjacent floating plate bodies 11 and improve the connection strength of the two, and further provides a convenient connection point for subsequent assembly and maintenance.

[0042] Optionally, the lap joint portion 12 can be arranged at any position of the outer periphery of the floating plate body 11, and the lap joint portion 12 is provided with a plurality of lap joint portions 12 to facilitate the lap joint with other floating plate bodies 11.

[0043] Specifically, the lap joint portion 12 in the embodiment is provided with four lap joint portions 12, and the four lap joint portions 12 are arranged at the four corners of the floating plate body 11, respectively, and the heights of the adjacent lap joint portions 12 are different or the four lap joint portions 12 are grouped into two groups, the heights of the lap joint portions 12 in each group are the same, and the heights of the lap joint portions 12 in different groups are different; so that the lap joint portions 12 between adjacent floating plate bodies 11 form a lap joint height difference, so as to realize the connection between the floating plate bodies 11.

[0044] Further, the floating bed mechanism 10 further comprises a protective net 13 arranged below the floating plate body 11 to block the contact between aquatic organisms and aquatic plants in the planting cylinder 21, that is, to avoid the problem that fish contacts the rhizome of aquatic plants and gnaws the rhizome, so as to protect the healthy growth of aquatic plants.

[0045] Specifically, the protective net 13 is in a semi-enclosed shape, and the opening thereof is connected to the bottom of the floating plate body 11 and forms a protective cavity, the planting cylinder 21 and the aquatic plants therein are arranged in the protective cavity to realize the protection of the aquatic plants. And the protective net 13 comprises a plurality of through holes to realize the contact and exchange with the water flow and substances in the water flow in the river channel.

[0046] Please refer to Figure 3 In the embodiment, the bottom of the planting cylinder 21 is provided with a plurality of through holes 211 for communicating the river channel environment inside and outside the planting cylinder 21, which not only provides a smooth flow channel for the water body, so that the root system of the aquatic plants can fully absorb the nutrients and oxygen in the water, promotes the healthy growth of the aquatic plants, and at the same time helps to maintain the flowability and ecological balance of the water body around the floating bed mechanism 10, reduces the problems such as eutrophication that may be caused by the stillness of the water body.

[0047] Please refer to Figure 2 and Figure 4In order to achieve the limiting and fixing of the planting cylinder 21 and the limiting mechanism 30, in the embodiment, the outer periphery of the planting cylinder 21 is provided with a fixing lug 22, the fixing lug 22 is provided with a sliding hole 221, the fixing lug 22 can be slidably connected to the limiting cylinder 31 through the sliding hole 221, the outer peripheral wall of the limiting cylinder 31 is provided with a limiting ball 32, the limiting ball 32 can be extended or retracted along the radial direction of the limiting cylinder 31, the limiting ball 32 can be extended to limit the fixing lug 22, or retracted to enable the fixing lug 22 to be slidably connected to the limiting cylinder 31. During installation, first, the limiting ball 32 is retracted into the limiting cylinder 31, then the fixing lug 22 is slidably connected to the limiting cylinder 31 through the sliding hole 221, then the limiting ball 32 is extended, and the clamping and fixing of the fixing lug 22 can be achieved. During disassembly, first, the limiting ball 32 is retracted into the limiting cylinder 31, then the fixing lug 22 is slid out of the limiting cylinder 31 through the sliding hole 221. Such an arrangement facilitates the quick disassembly and assembly of the planting cylinder 21, improves the convenience of disassembly and assembly, further improves the limiting effect compared with the existing rope fixing method, and enables the user to intuitively observe the limiting state, thereby facilitating subsequent adjustment and maintenance.

[0048] Alternatively, the fixing lug 22 and the limiting cylinder 31 are provided with at least two corresponding ones, so as to improve the connection strength between the planting cylinder 21 and the floating plate body 11, and to make the installation of the planting cylinder 21 more stable. Specifically, in the embodiment, the fixing lug 22 and the limiting cylinder 31 are provided with two corresponding ones, and the two fixing lugs 22 and the two limiting cylinders 31 are oppositely arranged, so as to improve the connection strength and stability of the installation and fixing of the planting cylinder 21.

[0049] Alternatively, the limiting ball 32 on the limiting cylinder 31 is also provided with at least two, so as to improve the limiting effect of the fixing lug 22. Specifically, in the embodiment, the limiting ball 32 on each limiting cylinder 31 is oppositely provided with two, so as to satisfy the better limiting effect of the fixing lug 22.

[0050] Specifically, the outer peripheral wall of the limiting cylinder 31 is provided with a through hole, so as to install the extension and retraction of the limiting ball 32.

[0051] Further, the limiting mechanism 30 further comprises a sliding rod 33, one end of the sliding rod 33 is slidingly arranged in the inner cavity of the limiting cylinder 31, the sliding rod 33 is in contact with the limiting ball 32, the outer periphery of the sliding rod 33 is provided with a stepped groove 331, the limiting ball 32 can be slidingly connected with the sliding rod 33, so that the limiting ball 32 is slidingly retracted into the stepped groove 331, that is, the sliding of the sliding rod 33 can realize the extension and retraction of the limiting ball 32, thereby realizing the disassembly and limiting of the planting cylinder 21. Under normal conditions, the limiting ball 32 is in contact with the outer peripheral wall of the sliding rod 33 and extends out of the limiting cylinder 31, when the installation of the planting cylinder 21 is needed, the sliding rod 33 is slid, so that the stepped groove 331 is in contact with the limiting ball 32, thereby realizing the embedding of the limiting ball 32 into the stepped groove 331, and the installation of the planting cylinder 21 can be realized; after installation, the sliding rod 33 is reset, and the limiting ball 32 extends out of the limiting cylinder 31 again, thereby realizing the limiting of the planting cylinder 21.

[0052] Specifically, the stepped groove 331 is arc-shaped, so as to facilitate the smooth transition of the limiting ball 32.

[0053] Further, the limiting mechanism 30 further comprises a push-pull piece 34, the push-pull piece 34 is arranged on one side of the limiting cylinder 31, and the push-pull piece 34 is fixedly connected to the other end of the sliding rod 33, the push-pull piece 34 can be slidingly connected to the floating plate body 11 along the axial direction of the limiting cylinder 31, so as to drive the sliding rod 33 to slidingly connect along the limiting cylinder 31. The arrangement of the push-pull piece 34 is more convenient for the user to operate the movement of the sliding rod 33, thereby further improving the convenience of disassembling the planting cylinder 21.

[0054] Specifically, the push-pull piece 34 comprises a push-pull part and a connecting part 342, the connecting part 342 and the push-pull part are arranged perpendicularly, the connecting part 342 is fixedly connected to the other end of the sliding rod 33, and the push-pull part is slidingly connected to the floating plate body 11 along the axial direction of the limiting cylinder 31, which not only realizes the guiding and pushing and pulling effects of the sliding of the sliding rod 33, but also limits the movement of the sliding rod 33, so as to avoid the problem of excessive sliding position of the sliding rod 33.

[0055] Optionally, the floating plate body 11 is provided with a sliding groove 112, and the push-pull piece 34 is provided with a sliding block 341, the sliding block 341 is slidingly connected to the sliding groove 112, which realizes the sliding guiding effect of the push-pull piece 34 on the floating plate body 11, and the groove bottom of the sliding groove 112 further limits the push-pull piece 34, thereby limiting the position of the sliding rod 33.

[0056] Optionally, one end of the push-pull piece 34 extending out of the floating plate body 11 is provided with a pull ring 36, which provides a convenient lifting operation point for the user, facilitates the push-pull operation of the user, and forms an adjusting ear of the floating bed mechanism 10, the user can also lift and move the floating bed mechanism 10 through the pull ring 36, which is convenient to operate.

[0057] Further, the inner cavity wall of the limiting cylinder 31 is provided with a groove to form a limiting groove 311, and the limiting groove 311 is provided with an elastic element 35, the elastic element 35 is sleeved on the sliding rod 33 and the two ends can be fixed on any groove wall along the axial direction of the limiting groove 311 and the outer peripheral wall of the sliding rod 33 respectively, that is, the automatic reset of the sliding rod 33 can be realized, that is, after the sliding rod 33 is driven to lift by the push-pull element 34, the elastic element 35 is compressed at this time, then the push-pull element 34 is released, the elastic element 35 resets to promote the automatic reset of the sliding rod 33, the operation convenience of the user is improved, and the elastic element 35 also provides stable support and buffering effect for the sliding of the sliding rod 33.

[0058] Specifically, the outer periphery of the sliding rod 33 is also provided with a limiting protrusion 332, and the two ends of the elastic element 35 are fixed and abut on any groove wall along the axial direction of the limiting groove 311 and the limiting protrusion 332 respectively, that is, the support stability and buffering effect provided by the elastic element 35 for the sliding of the sliding rod 33 can be realized.

[0059] The following refers to Figures 1 to 4 The installation process of the river ecological floating bed provided in the embodiment will be described in detail.

[0060] During installation, the planting cylinder 21 is placed on the upper top end of the floating plate main body 11, then the two fixing ears 22 are aligned with the corresponding limiting cylinders 31 and are inserted; in this process, the user needs to pull the pull ring 36 upward to drive the push-pull element 34 and the sliding rod 33 to move, the limiting protrusion 332 of the sliding rod 33 also moves upward and extrudes the elastic element 35, so that the elastic element 35 shrinks, and the stepped groove 331 of the sliding rod 33 also contacts the limiting ball 32, so that the limiting ball 32 shrinks in the stepped groove 331, at this time, the fixing ear 22 is sleeved on the outer wall of the limiting cylinder 31 through the slide hole 221 and slides downward, so that the installation of the planting cylinder 21 is realized. Then the pull ring 36 is released, due to the elastic reset effect of the elastic element 35, the sliding rod 33 is driven to reset automatically, and due to the extrusion effect, the outer peripheral wall of the sliding rod 33 will re-extrude the limiting ball 32, at this time, the limiting ball 32 extends out of the outer wall of the limiting cylinder 31 again, and the limiting of the planting cylinder 21 is realized.

[0061] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A river ecological floating bed, characterized in that, include: A floating bed mechanism (10) includes at least one float plate body (11), and the float plate body (11) has a mounting hole (111); Planting mechanism (20), the planting mechanism (20) includes at least one planting cylinder (21), the planting cylinder (21) is disposed one-to-one in the mounting hole (111) of the floating plate body (11), the planting cylinder (21) is used to plant aquatic plants; The limiting mechanism (30) includes at least one limiting cylinder (31), which is disposed on the floating plate body (11) and close to the outer periphery of the mounting hole (111). The limiting cylinder (31) is used to limit and fix the planting mechanism (20).

2. The river ecological floating bed according to claim 1, characterized in that, The planting tube (21) is provided with a fixing ear (22) on its outer periphery. The fixing ear (22) is provided with a sliding hole (221). The fixing ear (22) can be slidably connected to the limiting tube (31) through the sliding hole (221). The outer peripheral wall of the limiting tube (31) is provided with a limiting ball (32). The limiting ball (32) can extend and retract along the radial direction of the limiting tube (31). The limiting ball (32) can extend to limit the fixing ear (22) or retract to allow the fixing ear (22) to be slidably connected to the limiting tube (31).

3. The river ecological floating bed according to claim 2, characterized in that, The limiting mechanism (30) further includes a sliding rod (33), one end of which is slidably disposed in the inner cavity of the limiting cylinder (31). The sliding rod (33) is in contact with the limiting ball (32). The outer periphery of the sliding rod (33) is provided with a stepped groove (331). The limiting ball (32) can be slidably connected with the sliding rod (33) so that the limiting ball (32) can slide and retract into the stepped groove (331).

4. The river ecological floating bed according to claim 3, characterized in that, The limiting mechanism (30) further includes a push-pull member (34), which is disposed on one side of the limiting cylinder (31) and fixedly connected to the other end of the sliding rod (33). The push-pull member (34) can slide along the axial direction of the limiting cylinder (31) to the float body (11) so as to drive the sliding rod (33) to slide along the limiting cylinder (31).

5. The river ecological floating bed according to claim 4, characterized in that, The main body (11) of the floating plate is provided with a sliding groove (112), and the push-pull member (34) is provided with a sliding block (341), which is slidably connected to the sliding groove (112).

6. The river ecological floating bed according to claim 4, characterized in that, The push-pull member (34) has a pull ring (36) at one end extending out of the float body (11).

7. The river ecological floating bed according to claim 3, characterized in that, The inner wall of the limiting cylinder (31) is provided with a groove to form a limiting groove (311). An elastic element (35) is provided in the limiting groove (311). The elastic element (35) is sleeved on the sliding rod (33) and its two ends can be fixed to any groove wall of the limiting groove (311) along its own axial direction and the outer peripheral wall of the sliding rod (33) respectively.

8. The river ecological floating bed according to any one of claims 1-7, characterized in that, The bottom of the planting tube (21) is provided with a plurality of through holes (211), which are used to connect the river environment inside and outside the planting tube (21).

9. The river ecological floating bed according to any one of claims 1-7, characterized in that, The outer periphery of the float body (11) is also provided with an overlapping part (12), and the overlapping parts (12) of two adjacent float bodies (11) are connected to each other.

10. The river ecological floating bed according to any one of claims 1-7, characterized in that, The floating bed mechanism (10) also includes a protective net (13), which is located below the main body of the floating plate (11) to prevent aquatic organisms from contacting the aquatic plants in the planting tube (21).

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