JP2024072622A - Post-processing method for wound-stacked body after pipeline rehabilitation construction - Google Patents

Abstract

To secure the advantage of a drum-less system even if a drum-less wound-stacked body remains after a pipeline rehabilitation construction.SOLUTION: A post-processing method for a wound-stacked body after a pipeline rehabilitation construction that pays out a belt-like member 90 from an annular wound-stacked body 91 accommodated in an annular accommodation chamber 19 of a construction reel 10, and manufactures a spiral pipe shaped rehabilitation pipe 9, to line an inner surface of a pipeline 1 with the rehabilitation pipe 9 comprises the steps of: taking out a remaining wound-stacked body 91A remaining after a pipeline rehabilitation construction from the construction reel 10, preferably, bundling the remaining wound-stacked body 91A with a bundling material 92A before and after the taking out; separating the remaining wound-stacked body 91A from the construction reel 10, carrying it and storing it; and using the remaining wound-stacked body 91A for rehabilitation construction of another pipeline 1B in a state in which the remaining wound-stacked body is accommodated in a second construction reel 20 having a second annular accommodation chamber 29 with a diameter larger than the annular accommodation chamber 19.SELECTED DRAWING: Figure 6

Description

The present invention relates to a method for post-processing an annular wound stack of wound strips used for rehabilitating pipelines such as aged sewer pipes, and in particular to a method for post-processing drumless wound stacks that remain after pipeline rehabilitation work.

As a method for rehabilitating existing pipelines such as aged sewer pipes, it is known to line the inner surface of the pipeline with a spiral pipe made of a long strip-shaped member (profile) made of synthetic resin (see Patent Documents 1 to 3, etc.). In Patent Document 1, the strip-shaped member is transported to the construction site in a wound state around a steel drum. The drum includes a pair of circular side plates with a central hole and a cylindrical body provided between the inner peripheral edges of the side plates. The strip-shaped member is wound around the outer periphery of the body to form an annular wound body. At the rehabilitation construction site, the body is pulled out to expose the inner periphery of the wound body. The strip-shaped member is then unwound from the inner periphery of the wound body through the central hole of the side plate and fed into the pipeline, where it is made into a spiral pipe.

In the method of Patent Document 1, after construction is completed, the empty drums must be returned to the manufacturing or storage site of the strip-shaped material. At the manufacturing or storage site, a sufficient number of drums must be secured to supply the market. This results in shipping costs for returning the empty drums, as well as drum production costs and maintenance costs.

In response to this, Patent Documents 2 and 3 propose a drumless system in which the wound stack of belt-shaped materials is stored and transported in a drumless state in which the drum is omitted and tied with a cable tie. A construction reel is prepared at the rehabilitation construction site. The construction reel includes a pair of circular frames with a central hole and multiple rod-shaped connecting members that connect these frames. The connecting members are provided at intervals in the circumferential direction of the outer periphery of the frames. The connecting member is removed from one side of the construction reel, and the drumless wound stack is inserted into the construction reel from the one side. The connecting member is then attached to the one side. With this drumless system, it is not necessary to return the drum after construction, and no return shipping fee is required. Furthermore, fewer construction reels are required than drums, which reduces production and maintenance costs.

Japanese Patent Application Laid-Open No. 10-128849 JP 2012-240803 A JP 2017-124941 A

In the drumless wound body of the above-mentioned Patent Documents 2 and 3, when the cable tie is released to pay out the belt-like member, the wound body gradually loosens and expands in diameter inside the construction reel. Therefore, if the wound body is not used up in one rehabilitation construction, the remaining wound body has to be stored and transported while still stored in the construction reel. This is because even if the remaining wound body is removed from the construction reel and then stored in a new construction reel of the same type at another construction site, it is difficult to store it because it has expanded in diameter. Therefore, construction reels are required for the number of remaining wound bodies, which reduces the advantage of the drumless construction and is inefficient.
In view of the above circumstances, the present invention has an object to provide a post-processing method that can ensure the advantages of the drumless system even if a drumless wound body is left over after a pipeline rehabilitation work.

In order to solve the above problems, the present invention provides a method for post-treating a surplus wound body remaining after a pipeline rehabilitation work, which comprises storing an annular wound body formed by winding a belt-shaped member in an annular storage chamber of a work reel, unwinding the belt-shaped member from the work reel, and lining an inner surface of a pipeline to produce a helical tube-shaped rehabilitating pipe using the unwound belt-shaped member, the method comprising the steps of:
removing the excess winding body from the application reel;
storing or transporting the surplus winding body away from the application reel;
A step of housing the surplus wound body in a second construction reel having a second annular housing chamber having a larger diameter than the annular housing chamber and using the surplus wound body for another pipeline rehabilitation construction;
The present invention is characterized by comprising:

The wound body is used drumless.
The application reel that has been emptied by the above-mentioned removal can be reused to accommodate a new wound body, so that the number of application reels required can be reduced.
By storing the surplus wound body alone, i.e., without a construction reel, the space required for storage can be reduced. Furthermore, the surplus wound body can be transported to another pipe rehabilitation construction site alone, i.e., without a construction reel, and the surplus wound body can be stored on a second construction reel at the other pipe rehabilitation construction site. The surplus wound body may be stored on a second construction reel and then transported to another pipe rehabilitation construction site. The surplus wound body may be stored or transported in a state where it is stored on the second construction reel.
On the other hand, the surplus wound body may have an increased diameter due to slack in winding. In contrast, since the second annular storage chamber of the second application reel has a larger diameter than the annular storage chamber of the application reel, the surplus wound body can be easily stored in the second application reel.
At the other pipeline rehabilitation site, the strip-shaped member of the surplus wound body is unwound from the second construction reel and used for the other pipeline rehabilitation work. The target of the other pipeline rehabilitation work does not necessarily have to be a pipeline located far from the pipeline that has been previously rehabilitated (before post-processing), but may be an unrehabilitated portion of a pipeline where rehabilitation work has been completed halfway, or may be a pipeline adjacent to the pipeline that has been rehabilitated, separated by a manhole or the like. In other words, the previous pipeline rehabilitation work site (before post-processing) and the other pipeline rehabilitation work site may be the same, adjacent, or close to each other.
The second construction reel that has been emptied after the surplus wound body has been used up can be reused for rehabilitation work using other surplus wound bodies. Since fewer second construction reels are required, the total production and maintenance costs for the construction reel and the second construction reel can be reduced. As a result, the advantages of the drumless system can be maintained.

Preferably, the excess wound stack is bound with a binding material before or after the removal.
This prevents the surplus wound body from becoming loose and expanding excessively in diameter, thus facilitating storage and transportation of the surplus wound body, and further allowing the surplus wound body to be reliably accommodated on the second application reel.

Preferably, the construction reel includes a pair of first circular frames and a plurality of first connecting members arranged at intervals in the circumferential direction of the construction reel and connecting the pair of first circular frames to each other, and the outer periphery of the annular storage chamber is defined by these first connecting members,
the second construction reel includes a pair of second circular frames having the same diameter as the first circular frame, and a plurality of second connecting members arranged at intervals in the circumferential direction of the second construction reel and connecting the pair of second circular frames to each other, and the outer periphery of the second annular storage chamber is defined by these second connecting members;
The distance from the center axis of the second construction reel to the second connecting member is greater than the distance from the center axis of the construction reel to the first connecting member.
Since the second circular frame has the same diameter as the first circular frame, a support base of the same size or specifications as the support base for the first application reel can be used as the support base for the second application reel. Therefore, the support bases can be reused.
The distance from the central axis of the construction reel to the first connecting member corresponds to the radius of the annular storage chamber. The distance from the central axis of the second construction reel to the second connecting member corresponds to the radius of the second annular storage chamber. By making the distance from the central axis of the second construction reel to the second connecting member greater than the distance from the central axis of the construction reel to the first connecting member, the second annular storage chamber has a larger diameter than the annular storage chamber.

According to the present invention, even if there is any drumless wound body remaining after the pipeline rehabilitation work, the construction reel used for the pipeline rehabilitation work can be reused. Therefore, the number of construction reels required can be reduced, and the production and maintenance costs of the construction reels can be reduced.

Fig. 1(a) is a plan view of a construction reel used in a pipeline rehabilitation construction. Fig. 1(b) is a front view of the construction reel. Fig. 1(c) is a plan view of a second construction reel used in another pipeline rehabilitation construction using an excess winding body. Fig. 1(d) is a front view of the second construction reel. 2(a) is a perspective view of the wound body, and FIG 2(b) is a perspective view of the surplus wound body. Fig. 3(a) is an explanatory cross-sectional view of the pipeline rehabilitation construction site showing the setting step in the pipeline rehabilitation construction, and Fig. 3(b) is an explanatory cross-sectional view of the pipeline rehabilitation construction site after setting. FIG. 4 is an explanatory cross-sectional view of a pipeline rehabilitation construction site, showing the lining process in the pipeline rehabilitation construction. Fig. 5(a) is an explanatory cross-sectional view of the pipeline rehabilitation construction site at the end of the pipeline rehabilitation construction. Fig. 5(b) is an explanatory cross-sectional view of the pipeline rehabilitation construction site showing a process of removing the excess wound body after the pipeline rehabilitation construction. Fig. 6(a) is an explanatory cross-sectional view showing a process of setting the surplus wound body onto a second construction reel at a rehabilitation construction site of another pipeline. Fig. 6(b) is an explanatory cross-sectional view showing a process of lining the other pipeline.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
4 shows a rehabilitation construction site 2 for an existing deteriorated pipeline 1. The pipeline 1 is rehabilitated by lining the inner surface of the pipeline 1 with a rehabilitation pipe 9. In this embodiment, the pipeline 1 to be rehabilitated is a sewer pipe. Note that the pipeline to be rehabilitated is not limited to a sewer pipe, and may be a water supply pipe, a gas pipe, an agricultural water pipe, a hydroelectric power generation water pipe, a tunnel, etc.

As shown in FIG. 4, the rehabilitation pipe 9 is made of a strip-shaped member 90 (profile) and has a helical tubular shape. The strip-shaped member 90 is formed into a long strip of a predetermined cross section from a synthetic resin such as polyvinyl chloride (PVC). The strip-shaped member 90 may include a reinforcing strip made of metal such as steel. The strip-shaped member 90 is sent from the construction reel 10 on the ground through the manhole 4 to the pipe making machine 3 in the pipeline 1, where it is made into a helical tubular rehabilitation pipe 9.

As shown in Fig. 1(a) and Fig. 1(b), the application reel 10 includes a pair of first circular frames 11 and a plurality of first connecting members 13. Each first circular frame 11 includes a circular side plate 11a having a central hole 11c, an inner peripheral rim 11b along the edge of the central hole 11c, an outer peripheral rim 11d surrounding the outer periphery of the side plate 11a, and a plurality of spokes 11e, 11f provided on the side plate 11a. The thin spokes 11e and the thick spokes 11f are alternately arranged radially in the circumferential direction of the side plate 11a. The inner end of each spoke 11e, 11f is joined to the inner peripheral rim 11b. The outer end of each spoke 11e, 11f extends from the side plate 11a and is joined to the outer peripheral rim 11d. A connecting portion 14 to the first connecting member 13 is provided near the outer end of the spoke 11f.
A pair of first circular frames 11 face each other in the axial direction of the application reel 10 (up and down in FIG. 1A, and a direction perpendicular to the paper surface in FIG. 1B).

The multiple first connecting members 13 are arranged at intervals in the circumferential direction of the construction reel 10. Each first connecting member 13 is formed in a rod shape extending in the axial direction of the construction reel 10. A pair of first circular frames 11 are connected to each other by the first connecting members 13. Both ends of the first connecting member 13 are connected to the connecting portion 14 of the corresponding first circular frame 11. Of the first connecting members 13, at least the first connecting member 13A on one side portion 10a in the circumferential direction of the construction reel 10 is detachable from the connecting portion 14A on the one side portion 10a and therefore from the first circular frame 11 (Figure 3(a)).

The internal space of the construction reel 10 forms an annular storage chamber 19. The outer periphery of the annular storage chamber 19 is defined by the first connecting member 13. Both axial ends of the annular storage chamber 19 are defined by a pair of first circular frames 11.

As shown in Fig. 2(a) , a belt-shaped member 90 before pipe making is wound into a ring shape to form a hollow cylindrical (annular) wound body 91. Belt-shaped binding materials 92 are provided at intervals in the winding direction of the wound body 91. The binding materials 92 are wound around a cross section perpendicular to the winding direction of the wound body 91 to bind the wound body 91. The outer diameter _D91 of the wound body 91 is slightly smaller ( _D91 < D13) than the outer diameter of the annular storage chamber 19, i.e., the distance _D13 from the central axis of the construction reel 10 to the first connecting member 13 (Fig. 1( _b )).

<Pipeline rehabilitation construction>
Pipeline rehabilitation work is carried out as follows.
As shown in FIG. 3( a ), a wound stack 91 bound with a binding material 92 is loaded onto a transport vehicle 6 and transported to a rehabilitation construction site 2 .
A construction reel 10 is prepared at the rehabilitation construction site 2. The construction reel 10 is rotatably installed on a support stand 5 near the ground entrance of the starting manhole 4.

3(a) and 3(b), the wound body 91 is removed from the transport vehicle 6 and set on the work reel 10 (setting process). More specifically, the first connecting member 13A is removed from one side 10a of the work reel 10. This opens the one side 10a. The wound body 91 is inserted into the annular storage chamber 19 from the opened one side 10a and stored therein. The first connecting member 13A is then reattached to the one side 10a of the work reel 10.
The wound stack 91 may be stored and set on the construction reel 10 in a storage yard or the like, and transported in this set state to be installed at the rehabilitation construction site 2. In this case, the setting work at the rehabilitation construction site 2 can be omitted.
Next, the binding material 92 is removed from the wound body 91 to release the binding of the wound body 91 (binding release step). This may cause the wound state of the wound body 91 to loosen.

4, the strip-shaped material 10 is successively paid out from the inner periphery side of the wound stack 91 (paying out process). The paid out strip-shaped material 10 is hung down the starting manhole 4 and introduced into the pipe making machine 3.
The strip-shaped member 10 is wound in a spiral shape by a pipe making machine 3, and produced into a helical rehabilitating pipe 9 that fits along the inner circumference of the pipeline 1 (pipe making process).

The pipe making machine 3 is a self-propelled pipe making machine that is placed at the front end (left end in FIG. 4) in the extension direction of the rehabilitated pipe 9 and self-propels in the spiral winding direction as the pipe is made. However, the pipe making machine is not limited to this, and may be a push-type pipe making machine that is placed at the bottom of the manhole 4 and pushes out the pipe while making it, or a towing type pipe making machine that uses a winch to pull the front end in the extension direction while making the pipe.

As shown in Fig. 5(a), in this manner, the rehabilitating pipe 9 is lined on the inner surface of the pipeline 1 (lining process), and the pipeline 1 is rehabilitated. At the end of the rehabilitation work, the wound body 91 may remain in the work reel 10. The remaining wound body 91 is referred to as the remaining wound body 91A. The remaining wound body 91A is expanded in diameter by loosening of the winding after the binding is released, and is attached to the first connecting member 13. For this reason, the outer diameter _D91A (Fig. 2(b)) of the remaining wound body 91A is larger than the initial outer diameter _D91 (Fig. 2(a)) of the wound body 91 ( _D91A > _D91 ), and is approximately the same size as the diameter of the annular storage chamber 19 ( _D91A ≈ _D13 ).

<Post-processing of excess winding body>
After the rehabilitation work, the surplus wound laminate 91A is post-treated as follows.
2B, the surplus wound layer 91A is bound by a band-shaped binding material 92A at a number of locations in the circumferential direction (rebinding step). This prevents the surplus wound layer 91A from becoming loose and expanding excessively in diameter, or from coming undone.

5(b), the first connecting member 13A is removed from the one side 10a of the application reel 10 to open the one side 10a. The surplus wound body 91A is removed from the one side 10a to the outside of the application reel 10 (removal process).
The removed surplus wound stack 91A is transported by the transport vehicle 6A to a storage yard (not shown) for storage (transportation and storage process). By transporting the surplus wound stack 91A away from the application reel 10, the load can be lightened. By storing the surplus wound stack 91A away from the application reel 10, the space required for storage can be reduced.
There is no need to prepare as many application reels 10 as there are surplus wound bodies 91A.
The construction reel 10 that has been emptied by the removal process can be reused for other rehabilitation work. Therefore, the required number of construction reels 10 can be reduced, and the production costs and maintenance costs of the construction reels 10 can be reduced.

As shown in Fig. 6(a), when the strip-shaped material 10 constituting the surplus wound stack 91A is needed at a rehabilitation construction site 2B of another pipeline 1B, the surplus wound stack 91A is loaded onto a transport vehicle 6B and transported to the rehabilitation construction site 2B. As described above, the load can be reduced.
At the rehabilitation construction site 2B, a second support stand 5B and a second construction reel 20 are prepared. The second support stand 5B is disposed near the ground entrance of the starting manhole 4B of the pipeline 1B. The second construction reel 20 is rotatably installed on the second support stand 5B.

As shown in Fig. 1(c) and Fig. 1(d), the second application reel 20 includes a pair of second circular frames 21 and a plurality of second connecting members 23. Each second circular frame 21 includes a circular side plate 21a having a central hole 21c, an inner peripheral rim 21b along the edge of the central hole 21c, an outer peripheral rim 21d surrounding the outer periphery of the side plate 21a, and a plurality of spokes 21e, 21f provided on the side plate 21a. The thin spokes 21e and the thick spokes 21f are alternately arranged radially in the circumferential direction of the side plate 21a. The inner end of each spoke 21e, 21f is joined to the inner peripheral rim 21b. The outer end of each spoke 21e, 21f extends from the side plate 21a and is joined to the outer peripheral rim 21d. A connecting portion 24 with the second connecting member 23 is provided near the outer end of the spoke 21f.
A pair of second circular frames 21 face each other in the axial direction of the second application reel 20 (up and down in FIG. 1C, a direction perpendicular to the paper surface in FIG. 1D).

The second connecting members 23 are spaced apart from one another in the circumferential direction near the outer periphery of the second construction reel 20. Each second connecting member 23 is formed in a rod shape extending in the axial direction of the second construction reel 20. A pair of second circular frames 21 are connected to each other by the second connecting members 23. Both ends of the second connecting member 23 are connected to the connecting portion 24 of the corresponding second circular frame 21. Of the second connecting members 23, at least the second connecting member 23A on one side 20a in the circumferential direction of the second construction reel 20 is detachable from the connecting portion 24A on the one side 20a and thus from the second circular frame 21 (FIG. 6(a)).

The outer diameter of the second circular frame 21 is equal to the outer diameter of the first circular frame 11. The length of the second connecting member 23 is equal to the length of the first connecting member 13. Therefore, the outer diameter and axial length of the second construction reel 20 are equal to the outer diameter and axial length of the first construction reel 10, respectively. For this reason, a support base of the same size or specifications as the support base 5 (Figure 3) for the construction reel 10 can be used as the second support base 5B. The support base 5 can also be reused as the second support base 5B.

The internal space of the second construction reel 20 forms an annular storage chamber 29. The outer periphery of the annular storage chamber 29 is defined by the second connecting member 23. Both axial ends of the annular storage chamber 29 are defined by a pair of second circular frames 21. The distance _D23 from the central axis of the second construction reel 20 to the second connecting member 23 is greater than the distance _D13 from the central axis of the first construction reel 10 to the first connecting member 13. For this reason, the second annular storage chamber 29 has a larger diameter than the first annular storage chamber 19. Preferably, the distance _D23 is approximately 1.03 to 1.1 times the distance _D13 , but is not limited to this.

As shown in Fig. 6(a), the surplus wound body 91A is set on the second application reel 20 (resetting step). More specifically, the second connecting member 23A on one side 20a of the second application reel 20 is removed. This opens the one side 20a. The surplus wound body 91A is inserted and accommodated in the second annular storage chamber 29 from the opened one side 20a. Even if the diameter of the surplus wound body 91A has expanded due to slack in winding, the second annular storage chamber 29 has a large diameter, so that the surplus wound body 91a can be easily accommodated and set on the second application reel 20.
Thereafter, the pulled-out second connecting member 23A is attached to one side portion 20a of the second construction reel 20.

Next, as shown in FIG. 6B, the binding material 92A is removed from the surplus wound and overlapped body 91A, and the binding of the surplus wound and overlapped body 91A is released (post-processing binding release step).
Thereafter, the strip-shaped material 10 is successively unwound from the inner periphery of the surplus wound stack 91A (post-processing unwinding process). The unwound strip-shaped material 10 is introduced into the pipe making machine 3B of the pipeline 1B through the starting manhole 4B, and the pipe making machine 3B produces a helical rehabilitating pipe 9B that fits along the inner periphery of the pipeline 1B (post-processing pipe making process).
This allows the excess wound body 91A to be used for rehabilitation work on a pipeline 1B separate from the pipeline 1.

When the second construction reel 20 is empty after using up the excess wound body 91A, it can be reused for rehabilitation work using other excess wound bodies. However, the second construction reel 20 is not required for storing and transporting other excess wound bodies. Therefore, fewer second construction reels 20 are required. This reduces the total production and maintenance costs of the construction reel 10 and the second construction reel 20. As a result, the advantages of the drumless system can be maintained.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the outer diameter of the second circular frame 21 may be larger than the outer diameter of the first circular frame 11. The second support base 5B may be for a construction reel that is larger than the support base 5.
The post-processing procedure can be changed as appropriate. For example, the surplus wound stack 91A may be bound with a binding material 92A after being removed from the construction reel 10. The surplus wound stack 91A may be stored and set on the second construction reel 20 in a storage yard or the like, and transported in this set state to be installed at another rehabilitation construction site 2B. In this case, the setting work at the rehabilitation construction site 2B can be omitted. Furthermore, the surplus wound stack 91A may be removed from the construction reel 10 and transferred to the second construction reel 20 at the original rehabilitation construction site 2.
The other rehabilitation construction site 2B (Figure 6) does not need to be located far from the previous (before post-treatment) rehabilitation construction site 2 (Figures 3 to 5), and may be at the same site as the rehabilitation construction site 2 or adjacent or close to the rehabilitation construction site 2. The rehabilitation construction of the pipeline 1 (Figures 3 to 5) may be temporarily stopped halfway, and then the unrehabilitated portion of the same pipeline 1 may be rehabilitated using the surplus winding material 91A as the "other rehabilitation construction site 2B." The adjacent pipeline 1' or 1" separated by the manhole 4 or 4' from the pipeline 1 in Figure 4 may be rehabilitated using the surplus winding material 91A as the "other rehabilitation construction site 2B."

The present invention can be applied, for example, to the rehabilitation of aging sewer pipes.

1 Pipe 1B, 1', 1" Another pipe 2 Rehabilitation construction site 2B Another rehabilitation construction site 3, 3B Pipe making machine 5, 5B Support stand 9 Rehabilitation pipe 10 Construction reel 10a One side 11 First circular frame 13 First connecting member 13A First connecting member 19 on one side Annular storage chamber 90 Strip-shaped member (profile)
91 Wound stack 91A Surplus wound stack 92, 92A Binding material 20 Second application reel 20a One side 21 Second circular frame 23 Second connecting member 23A Second connecting member 29 Second annular storage chamber

Claims (3)

A method for post-treating a surplus wound body remaining after a pipeline rehabilitation work, comprising: storing an annular wound body formed by winding a belt-shaped member in an annular storage chamber of a work reel; unwinding the belt-shaped member from the work reel; and lining an inner surface of a pipeline to produce a helical tube-shaped rehabilitating pipe using the unwound belt-shaped member, the method comprising the steps of:
removing the excess winding body from the application reel;
storing or transporting the surplus winding body away from the application reel;
A step of housing the surplus wound body in a second construction reel having a second annular housing chamber having a larger diameter than the annular housing chamber and using the surplus wound body for another pipeline rehabilitation construction;
A method for post-processing a wound body, comprising: The post-processing method according to claim 1, in which the excess wound stack is bound with a binding material before or after the removal. the construction reel includes a pair of first circular frames and a plurality of first connecting members arranged at intervals in the circumferential direction of the construction reel and connecting the pair of first circular frames to each other, and the outer periphery of the annular storage chamber is defined by these first connecting members;
the second construction reel includes a pair of second circular frames having the same diameter as the first circular frame, and a plurality of second connecting members arranged at intervals in the circumferential direction of the second construction reel and connecting the pair of second circular frames to each other, and the outer periphery of the second annular storage chamber is defined by these second connecting members;
The post-processing method according to claim 1 or 2, wherein a distance from a central axis of the second application reel to the second connecting member is greater than a distance from a central axis of the application reel to the first connecting member.

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