Well lid combined by composite well lid and cast iron jacket and construction method of well lid

Abstract

The invention discloses a well lid combined by a composite well lid and a cast iron jacket. The reverse side of the composite well seat is embedded with a quick-taking screw sheet, then the quick-taking screw sheet is placed into the cast iron jacket, a bolt A is inserted into a connecting bolt A hole, a composite anti-falling frame is placed into the cast iron jacket, a bolt B is inserted into a bolt B hole, the upper end of an inner opening of the composite well seat is bonded with a dust-proof rubber ring and then placed into the composite well cover, and a gap between the cast iron jacket and the composite well seat is filled with a gap circulation sealing material. The colored pattern material is embedded into the upper plane of the composite well lid, the waterproof glue piston is embedded into a double-opening lid hole in the upper face of the composite well lid, and the composite well seat quick-taking screw rod is screwed into the composite well seat quick-taking screw piece till the quick-taking screw rod makes contact with the upper plane of the cast iron outer sleeve. The invention discloses a construction method of a well lid formed by combining a composite well lid and a cast iron jacket. Manufacturing, assembling, construction and installation are carried out, and the failed well seat and well cover can be quickly dismounted. The combined well lid is free of abnormal sound, does not disturb residents, is attractive, can be taken out and also can be quickly embedded, and is capable of preventing abnormal sound, dust and slag and water.

Description

Technical Field

[0001] The present invention belongs to the technical field of manhole covers, and in particular relates to a manhole cover composed of a composite manhole cover and a cast iron outer casing, and also relates to a construction method of the manhole cover. Background Art

[0002] Cast iron manhole covers will produce abnormal noises, disturb people, are unsightly, and are not anti-theft after long-term use. In addition, they are difficult to open later. The disadvantages of composite manhole covers are that they are not anti-deviated, not anti-settled, and difficult to open for later maintenance of facilities in the well. Composite manhole covers will shift from the wellhead during the construction of road rollers, resulting in a shortened lifespan. After a period of use, dust will accumulate in the gap between the composite manhole cover and the composite well seat, making it difficult to open the manhole cover, and subsequent maintenance of facilities is difficult. Generally, power wells and communication wells are afraid of flooding, so no matter whether it is a cast iron manhole cover or a composite manhole cover, it will leak. As a result, subsequent maintenance of facilities in the well requires the use of a pump to pump out the accumulated water in the well, which brings great inconvenience to subsequent maintenance. Considering the above shortcomings, in order to avoid the shortcomings of the two manhole covers, it is necessary to combine the two manhole covers into one manhole cover. For example, it is impossible to embed a whole set of standard-sized composite manhole covers into the cast iron jacket. For example, if an 80cm round composite manhole seat is embedded in an 80cm round cast iron jacket, the cast iron jacket will be either 5mm larger or 5mm smaller. This is because the cast iron jacket will have a size error of 5mm after production, which leads to the disadvantage that the composite well seat cannot be embedded in the cast iron jacket. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a composite manhole cover which is noise-free, does not disturb people, is beautiful, can quickly take out a whole set of composite manhole covers, can quickly insert a whole set of composite manhole covers, can quickly replace failed manhole covers, and is a manhole cover combined with a cast iron jacket, and a construction method thereof, which is noise-proof, dust-proof, and waterproof.

[0004] The purpose of the present invention and the solution of its main technical problems are achieved by adopting the following technical solutions: The present invention discloses a manhole cover composed of a composite manhole cover and a cast iron jacket, comprising a cast iron jacket, a composite manhole seat, a composite manhole cover, an anti-sludge rubber ring, a waterproof rubber piston, a connecting bolt A, a composite manhole seat quick-access screw blade, a gap circulation sealing material, a color pattern, a composite anti-fall frame, a connecting bolt B, and a composite manhole seat quick-access screw rod, and is characterized in that: a composite manhole seat quick-access screw blade is embedded under the composite manhole seat, and then the composite manhole seat is placed in the cast iron jacket, the connecting bolt A is inserted and screwed into the connecting bolt A hole, the composite anti-fall frame is placed in the cast iron jacket, the connecting bolt B is inserted and screwed into the connecting bolt B hole, an anti-sludge rubber ring is bonded to the inner opening of the composite manhole seat, the composite manhole cover is placed in the anti-sludge rubber ring, a color pattern material is embedded in the plane of the composite manhole cover, the waterproof rubber piston is embedded in the double-opening cover hole on the composite manhole cover, the gap between the cast iron jacket and the composite manhole seat is filled with the gap circulation sealing material, the composite manhole cover is opened, the composite manhole cover is inserted into the composite manhole seat quick-access screw rod and screwed into the composite manhole seat quick-access hole until it contacts the upper plane inside the cast iron jacket.

[0005] The cast iron outer casing, the composite well seat, the anti-sludge rubber ring composite well cover, the upper plane color pattern reserved groove, the double cover hole, and the waterproof rubber piston.

[0006] A construction method of a composite manhole cover and a cast iron jacket combined manhole cover, characterized in that it comprises the following steps: 1) Production; Based on the standard size, the inner diameter of the cast iron jacket is enlarged to 18mm-22mm; the cast iron jacket is made, and then a composite well seat and a composite well cover are made according to the standard size, and a color pattern groove is reserved on the plane of the composite well cover, a dust-proof rubber ring, a waterproof rubber piston, a connecting bolt A, a composite well seat quick-release screw piece, a gap flow sealing material, a color pattern filling material composite anti-fall frame, a connecting bolt B, and a composite well seat quick-release screw are reserved on the plane of the composite well cover.

[0007] 2) Assembly Embed the colored patterned mixed material on the flat surface of the composite manhole cover in sequence, embed the composite manhole seat on the back side, put the composite manhole seat quick-access screw into the cast iron jacket, insert the connecting bolt A into the connecting bolt A hole, put the composite anti-fall frame into the cast iron jacket, insert the connecting bolt B into the connecting bolt B hole, glue the anti-sedimentation rubber ring on the inner mouth of the composite manhole seat, put the composite manhole cover into the anti-sedimentation rubber ring, fill the gap between the cast iron jacket and the composite manhole seat with the gap flow sealing material, and the assembly is completed.

[0008] 3) On-site installation; Install the composite manhole cover and cast iron jacket combination manhole cover on the foundation prepared at the construction site, and then pour it with cement slurry; 4) Removal of failed composite manhole cover and well seat; After the composite manhole cover reaches the end of its service life, the failed composite manhole seat needs to be removed. First, remove the composite manhole cover, then insert the composite manhole seat cache screw into the cache hole set on the composite manhole seat and screw it into the composite manhole seat cache piece until the composite manhole seat cache screw rests against the upper plane inside the cast iron jacket. Keep turning it clockwise until the composite manhole seat and the cast iron jacket loosen and separate, then the composite manhole seat can be removed.

[0009] The gap flow sealing material is made by mixing epoxy resin A glue, epoxy resin B glue, carbon fiber, quartz sand and talcum powder; by weight ratio; 26 parts of epoxy resin A glue, 26 parts of epoxy resin B glue, 10 parts of carbon fiber, 28 parts of quartz sand and 10 parts of talcum powder are mixed and stirred evenly.

[0010] The colorful pattern is made by mixing epoxy resin A glue, epoxy resin B glue, carbon fiber and iron oxide pigment; by weight ratio: 35 parts of epoxy resin A glue, 35 parts of epoxy resin B glue, 20 parts of carbon fiber and 10 parts of iron oxide pigment are mixed and stirred evenly.

[0011] Compared with the prior art, the present invention has obvious beneficial effects; it can be seen from the above technical scheme: by embedding a composite well seat quick-access screw sheet under the composite well seat, the composite well seat is then placed in the cast iron outer casing, the connecting bolt A is inserted and screwed into the connecting bolt A hole, the composite anti-fall frame is placed in the cast iron outer casing, the connecting bolt B is inserted and screwed into the connecting bolt B hole, an anti-sedimentation rubber ring is bonded to the inner mouth of the composite well seat, the composite well cover is placed in the anti-sedimentation rubber ring, a colored patterned material is embedded in the flat surface of the composite well cover, a waterproof rubber piston is embedded in the double-opening cover hole on the composite well cover, the gap between the cast iron outer casing and the composite well seat is filled with a gap circulation sealing material, the composite well cover is opened, the composite well seat quick-access screw is inserted and screwed into the composite well seat quick-access hole until it contacts the upper flat surface inside the cast iron outer casing. Enlarge the size of the cast iron jacket, put the whole set of composite manhole covers of standard size into the cast iron jacket, and fill the gaps larger than 1 / 4 with gap flow sealing materials to solve the problem that the cast iron jacket cannot be integrated with the composite manhole cover. After the composite manhole cover is combined with the cast iron jacket, no abnormal noise will be generated because the material used in the composite manhole cover itself will not make abnormal noise. Insert the composite manhole seat cache screw into the cache hole set on the composite manhole seat and screw it into the composite manhole seat cache piece. The composite manhole seat cache screw is against the upper plane inside the cast iron jacket, and it is turned clockwise until the composite manhole seat and the cast iron jacket are loosened and separated, and the composite manhole seat can be taken out. The method of quickly taking out and quickly installing the whole set of composite manhole covers is solved. After the composite manhole cover reaches the service life, only the whole set of composite manhole covers needs to be replaced. The cast iron jacket can be used for a long time and can be easily taken out and replaced. There is no need to dig a big hole on the road surface for replacement, such as digging a big hole is time-consuming and destructive. In order to solve the problem of inconvenience in public transportation, the reserved groove on the composite manhole cover is filled with a colorful pattern formed by mixing epoxy resin A glue, epoxy resin B glue, carbon fiber, and iron oxide pigment, which is beautiful. An anti-sediment rubber ring is glued on the inner opening of the composite manhole seat, and the composite manhole cover is placed in the anti-sediment rubber ring. Dust and water will not penetrate, and dust and water are prevented. In short, the present invention has no abnormal sound, does not disturb people, is beautiful, and can quickly withdraw the whole set of composite manhole covers, and can also quickly install the whole set of composite manhole covers. Invalid manhole covers can be quickly replaced, and they are anti-sounding, anti-dust and waterproof. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Is a schematic diagram of the structure of the present invention; Figure 2 is a bottom view of the present invention; Figure 3 yes Figure 1 Schematic diagram of the structure without the composite manhole cover; Figure 4 is an exploded view of the present invention; Figure 5 It is a structural schematic diagram of the cast iron outer casing, the composite well seat, the anti-sludge rubber ring, the connecting bolt A, and the gap flow sealing material of the present invention; Figure 6It is a structural schematic diagram of the cast iron outer casing, the connecting bolt A, and the composite well seat screw piece of the present invention; Figure 7 It is a schematic diagram of the structure of the composite manhole cover, waterproof rubber plug and colorful pattern of the present invention; Figure 8 It is a structural schematic diagram of the composite well seat of the present invention; Fig. 9 It is a schematic structural diagram of the cast iron outer casing of the present invention; Fig.10 It is a schematic diagram of the installation of the cast iron outer casing of the present invention; Fig.11 It is a replacement state diagram of the composite manhole cover of the present invention.

[0013] Marking in the figure; 1. Cast iron jacket, 2. Composite well seat, 3. Composite well cover, 4. Anti-sludge rubber ring, 5. Waterproof rubber piston, 6. Connecting bolt A, 7. Composite well seat screw, 8. Gap flow sealing material, 9. Colored circle, 10. Cast iron anti-fall frame, 11. Connecting bolt B, 12. Composite well seat quick-release screw, 13. Connecting bolt A hole, 14. Connecting bolt B hole, 15. Cement slurry, 16. Foundation. DETAILED DESCRIPTION

[0014] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0015] Implementation The present invention discloses a manhole cover composed of a composite manhole cover and a cast iron jacket, comprising a cast iron jacket 1, a composite manhole seat 2, a composite manhole cover 3, an anti-sludge rubber ring 4, a waterproof rubber plug 5, a connecting bolt A6, a composite manhole seat quick-access screw piece 7, a gap circulation sealing material 8, a color pattern 9, a composite anti-fall frame 10, a connecting bolt B11, and a composite manhole seat quick-access screw 12, and is characterized in that: a composite manhole seat quick-access screw piece 7 is embedded under the composite manhole seat 2, and then the composite manhole seat 2 is placed in the cast iron jacket 1, the connecting bolt A6 is inserted and screwed into the connecting bolt A hole 13, the composite anti-fall frame 10 is placed in the cast iron jacket 1, the connecting bolt B11 is inserted and screwed into the connecting bolt B hole 14, the anti-sludge rubber ring 4 is bonded to the inner opening of the composite manhole seat 2, the composite manhole cover 3 is placed in the anti-sludge rubber ring 4, the gap between the cast iron jacket 1 and the composite manhole seat 2 is filled with the gap circulation sealing material 8, and the waterproof rubber plug 5 and the color pattern 9 are embedded in the hole set on the composite manhole cover 3.

[0016] A construction method of a composite manhole cover and a cast iron jacket combined manhole cover, characterized in that it comprises the following steps: 1) Production; Based on the standard size, the inner diameter of the cast iron jacket 1 is enlarged to 18 mm; the cast iron jacket 1 is made, and the composite manhole seat 2, the composite manhole cover 3, the anti-sludge rubber ring 4, and the composite anti-fall frame 10 are made according to the standard size. When making the composite manhole cover 3, a pattern groove is reserved on the composite manhole cover 3, and the pattern groove is filled with a mixed material that is evenly mixed and stirred to form a color pattern 9; 2) Assembly In sequence, embed the composite well seat quick-access screw piece 7 under the composite well seat 2, put it into the cast iron jacket 1, insert the connecting bolt A6 and screw it into the connecting bolt A hole 13, put the composite anti-fall frame 10 into the cast iron jacket 1, insert the connecting bolt B11 and screw it into the connecting bolt B hole 14, glue the anti-sedimentation rubber ring 4 on the inner mouth of the composite well seat 2, put the anti-sedimentation rubber ring 4 into the composite well cover 3, fill the gap between the cast iron jacket 1 and the composite well seat 2 with the gap flow sealing material 8, and the assembly is completed.

[0017] 3) On-site installation; The composite manhole cover and the cast iron jacket are combined in the prepared foundation 16, and then poured with cement slurry 15; 4) Removal of failed composite manhole cover and well seat; The composite manhole cover 3 and the composite manhole seat 2 need to be removed and replaced after they expire. First, remove the composite manhole cover 3, then insert the composite manhole seat cache screw 12 into the cache hole set on the composite manhole seat 2 and screw into the composite manhole seat cache piece 7. The composite manhole seat cache screw 12 rests against the upper plane inside the cast iron jacket. Turn the composite manhole seat cache screw 12 clockwise until the composite manhole seat cache piece 7 moves upward. The composite manhole seat cache piece 7 drives the composite manhole seat 2 to move upward until the composite manhole seat 2 is loosened and separated from the cast iron jacket 1, and then the composite manhole seat 2 can be taken out.

[0018] The gap flow sealing material 8 is made of a mixture of epoxy resin A glue, epoxy resin B glue, carbon fiber, quartz sand, and talcum powder; by weight ratio; 26 parts of epoxy resin A glue, 26 parts of epoxy resin B glue, 10 parts of carbon fiber, 28 parts of quartz sand, and 10 parts of talcum powder are mixed and stirred evenly.

[0019] The colorful pattern 9 is made of epoxy resin A glue, epoxy resin B glue, carbon fiber, and iron oxide pigment; by weight ratio: 35 parts of epoxy resin A glue, 35 parts of epoxy resin B glue, 20 parts of carbon fiber, and 10 parts of iron oxide pigment are mixed and stirred evenly.

[0020] Implementation II The present invention discloses a manhole cover composed of a composite manhole cover and a cast iron jacket, comprising a cast iron jacket 1, a composite manhole seat 2, a composite manhole cover 3, an anti-sludge rubber ring 4, a waterproof rubber plug 5, a connecting bolt A6, a composite manhole seat quick-access screw piece 7, a gap circulation sealing material 8, a color pattern 9, a composite anti-fall frame 10, a connecting bolt B11, and a composite manhole seat quick-access screw 12, and is characterized in that: a composite manhole seat quick-access screw piece 7 is embedded under the composite manhole seat 2, and then the composite manhole seat 2 is placed in the cast iron jacket 1, the connecting bolt A6 is inserted and screwed into the connecting bolt A hole 13, the composite anti-fall frame 10 is placed in the cast iron jacket 1, the connecting bolt B11 is inserted and screwed into the connecting bolt B hole 14, the anti-sludge rubber ring 4 is bonded to the inner opening of the composite manhole seat 2, the composite manhole cover 3 is placed in the anti-sludge rubber ring 4, the gap between the cast iron jacket 1 and the composite manhole seat 2 is filled with the gap circulation sealing material 8, and the waterproof rubber plug 5 and the color pattern 9 are embedded in the hole set on the composite manhole cover 3.

[0021] A construction method of a composite manhole cover and a cast iron jacket combined manhole cover, characterized in that it comprises the following steps: 1) Production; Based on the standard size, the inner diameter of the cast iron jacket 1 is enlarged to 22 mm; the cast iron jacket 1 is made, and the composite manhole seat 2, the composite manhole cover 3, the anti-sludge rubber ring 4, and the composite anti-fall frame 10 are made according to the standard size. When making the composite manhole cover 3, a pattern groove is reserved on the composite manhole cover 3. The pattern groove is filled with a mixed material that is evenly mixed and stirred to form a color pattern 9; 2) Assembly In sequence, embed the composite well seat quick-access screw piece 7 under the composite well seat 2, put it into the cast iron jacket 1, insert the connecting bolt A6 and screw it into the connecting bolt A hole 13, put the composite anti-fall frame 10 into the cast iron jacket 1, insert the connecting bolt B11 and screw it into the connecting bolt B hole 14, glue the anti-sedimentation rubber ring 4 on the inner mouth of the composite well seat 2, put the anti-sedimentation rubber ring 4 into the composite well cover 3, fill the gap between the cast iron jacket 1 and the composite well seat 2 with the gap flow sealing material 8, and the assembly is completed.

[0022] 3) On-site installation; The composite manhole cover and the cast iron jacket are combined in the prepared foundation 16, and then poured with cement slurry 15; 4) Removal of failed composite manhole cover and well seat; The composite manhole cover 3 and the composite manhole seat 2 need to be removed and replaced after they expire. First, remove the composite manhole cover 3, then insert the composite manhole seat cache screw 12 into the cache hole set on the composite manhole seat 2 and screw into the composite manhole seat cache piece 7. The composite manhole seat cache screw 12 rests against the upper plane inside the cast iron jacket. Turn the composite manhole seat cache screw 12 clockwise until the composite manhole seat cache piece 7 moves upward. The composite manhole seat cache piece 7 drives the composite manhole seat 2 to move upward until the composite manhole seat 2 is loosened and separated from the cast iron jacket 1, and then the composite manhole seat 2 can be taken out.

[0023] The gap flow sealing material 8 is made of a mixture of epoxy resin A glue, epoxy resin B glue, carbon fiber, quartz sand, and talcum powder; by weight ratio; 26 parts of epoxy resin A glue, 26 parts of epoxy resin B glue, 10 parts of carbon fiber, 28 parts of quartz sand, and 10 parts of talcum powder are mixed and stirred evenly.

[0024] The colorful pattern 9 is made of epoxy resin A glue, epoxy resin B glue, carbon fiber, and iron oxide pigment; by weight ratio: 35 parts of epoxy resin A glue, 35 parts of epoxy resin B glue, 20 parts of carbon fiber, and 10 parts of iron oxide pigment are mixed and stirred evenly.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A composite manhole cover and a cast iron outer casing, comprising a cast iron outer casing (1), a composite manhole seat (2), a composite manhole cover (3), an anti-sludge rubber ring (4), a waterproof rubber piston (5), a connecting bolt A (6), a composite manhole seat quick-release screw (7), a gap flow sealing material (8), a color pattern (9), a composite anti-fall frame (10), a connecting bolt B (11), and a composite manhole seat quick-release screw (12), characterized in that; The composite well seat quick-release screw (7) is embedded under the composite well seat (2), and then the composite well seat is placed in the cast iron outer casing (1), and the connecting bolt A (6) is inserted and screwed into the connecting bolt A hole (13). The composite anti-fall frame (10) is placed in the cast iron outer casing (1), and the connecting bolt B (11) is inserted and screwed into the connecting bolt B hole (14). The anti-sludge rubber ring (4) is bonded to the inner opening of the composite well seat (2), and the composite well cover (3) is placed in the anti-sludge rubber ring (4). The color pattern material (9) is embedded in the upper plane of the composite well cover (3), and the waterproof rubber piston (5) is embedded in the double cover hole on the upper side of the composite well cover (3). The gap between the cast iron outer casing (1) and the composite well seat (2) is filled with the gap flow sealing material (8). The composite well cover (3) is opened, and the composite well seat quick-release screw (12) is inserted and screwed into the quick-release hole of the composite well seat (2) until it contacts the inner upper plane of the cast iron outer casing (1).

2. The manhole cover composed of a composite manhole cover and a cast iron casing as claimed in claim 1, characterized in that: The composite manhole cover (3) has a flat surface embedded with a colored patterned material (9), and the waterproof rubber piston (5) is embedded in the double-opening hole on the composite manhole cover (3).

3. A construction method for a composite manhole cover and a cast iron jacket combined manhole cover, characterized in that; The method comprises the following steps: 1) Production; Based on the standard size, the inner diameter of the cast iron jacket (1) is enlarged to 18 mm-22 mm; the cast iron jacket (1) is made, and a composite well seat (2) and a composite well cover (3) are made according to the standard size, a color pattern groove is reserved on the plane of the composite well cover (3), a dust residue rubber ring (4), a waterproof rubber piston (5), a connecting bolt A (6), a composite well seat quick-take screw (7), a gap flow sealing material (8), a color pattern filling material (9), a composite anti-fall frame (10), a connecting bolt B (11), and a composite well seat quick-take screw (12); 2) Assembly; In order, the composite manhole cover (3) is embedded with a color patterned mixed material on the upper surface, the composite manhole seat (2) is embedded with a composite manhole seat quick-access screw (7) on the reverse side, is placed in the cast iron jacket (1), the connecting bolt A (6) is inserted and screwed into the connecting bolt A hole (13), the composite anti-fall frame (10) is placed in the cast iron jacket (1), the connecting bolt B (11) is inserted and screwed into the connecting bolt B hole (14), the anti-sludge rubber ring (4) is bonded to the inner opening of the composite manhole seat (2), the composite manhole cover (3) is placed in the anti-sludge rubber ring (4), the gap between the cast iron jacket (1) and the composite manhole seat (2) is filled with a gap flow sealing material (8), and the assembly is completed; 3) On-site installation; Installing a composite manhole cover and a cast iron jacket on a foundation (16) prepared at the construction site, and then pouring cement slurry (15); 4) Removal of failed composite manhole cover and well seat; When the composite manhole cover (3) reaches the end of its service life, the failed composite manhole seat (2) needs to be removed. First, the composite manhole cover (3) is removed, and then the composite manhole seat quick-release screw (12) is inserted into the quick-release hole provided on the composite manhole seat (2) and screwed into the composite manhole seat quick-release plate (7) until the composite manhole seat quick-release screw (12) abuts against the inner upper plane of the cast iron outer casing. The screw is then turned clockwise until the composite manhole seat (2) and the cast iron outer casing (1) are loosened and separated, and the composite manhole seat (2) can be removed.

4. The construction method of the manhole cover composed of a composite manhole seat and a cast iron outer casing as claimed in claim 3, characterized in that: The gap flow sealing material (8) is prepared by mixing epoxy resin A glue, epoxy resin B glue, carbon fiber, quartz sand, and talcum powder; in terms of weight ratio, 26 parts of epoxy resin A glue, 26 parts of epoxy resin B glue, 10 parts of carbon fiber, 28 parts of quartz sand, and 10 parts of talcum powder are mixed and stirred evenly.

5. The composite manhole cover as claimed in claim 3 is provided with a color patterned mixed material embedded in the plane, characterized in that; The color pattern (9) is made by mixing epoxy resin A glue, epoxy resin B glue, carbon fiber, and iron oxide pigment; by weight: 35 parts of epoxy resin A glue, 35 parts of epoxy resin B glue, 20 parts of carbon fiber, and 10 parts of iron oxide pigment are mixed and stirred evenly.

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