JP7397308B2 - Sonar dome mounting structure - Google Patents

Description

The present invention relates to a structure for mounting a sonar dome that covers a transducer installed on the bottom of a ship and protects the transducer from noise generated from the ship's own ship.

Conventionally, a sonar dome that protects the transducer placed on the bottom of the ship, including the bow and bottom of an observation vessel, consists of a sonar dome body whose entire edge is attached to the bottom of the ship and covers the area around the transducer, and a sonar dome. It is equipped with filler rubber attached to a location near the edge of the main body.
Sonar domes are conventionally made of rubber.

JP2012-111310

However, in recent years, as ships have been traveling at higher speeds, problems such as deformation of the sonar dome main body of the sonar dome and the generation of resistance may occur during high-speed navigation.
Therefore, the present inventor has proposed a sonar dome body made of FRP that can prevent deformation during high-speed navigation.
However, in this case, since the FRP sonar dome body is harder than the rubber sonar dome body, there is a problem that the mounting structure of the rubber sonar dome cannot be used as is, and the navigation speed is faster than before. This causes a problem in that the filler rubber also tends to peel off from the sonar dome body.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to prevent the deformation of the sonar dome body even during high-speed navigation, and to prevent the filler rubber from peeling off from the sonar dome body. An object of the present invention is to provide an advantageous sonar dome mounting structure.

In order to achieve the above object, the present invention provides a sonar dome body whose entire edge is attached to the bottom of the ship and has an inner surface facing toward a wave transducer disposed on the bottom of the ship and covering the periphery of the wave transceiver; a filler rubber bonded to an outer surface facing away from the transducer at a location near the edge of the dome body, the sonar dome body being made of FRP; The edge portion is formed by a bead portion having a circular cross section and having an outer diameter larger than the wall thickness of the sonar dome body, and the edge portion is formed by a bead portion having a circular cross section and having an outer diameter larger than the wall thickness of the sonar dome body. The bead portion is clamped by a clamping recess of a bead clamp that is removably coupled, and an upper portion of the filler rubber is attached to the bead sheet.

According to the present invention, since the sonar dome body is made of FRP, it is advantageous in preventing deformation of the sonar dome body even during high-speed navigation, and is advantageous in suppressing the resistance of the bottom of the ship during high-speed navigation. becomes.
In addition, a bead for attaching the sonar dome is provided around the entire edge of the sonar dome body, so by holding the bead with the holding recess of the bead seat and bead clamp, it can be easily and securely attached to the bottom of the ship. It will be advantageous.
In addition, since the bead sheet used to attach the sonar dome is used as the attachment part for the upper part of the filler rubber, the filler rubber can be firmly attached to the sonar dome body without the need for any special parts. This is advantageous in preventing the filler rubber from peeling off from the sonar dome body at times, and is advantageous in improving the durability of the sonar dome.

FIG. 3 is a side view of the sonar dome placed on the bottom of the ship. (A) is a plan view of the sonar dome main body, (B) is the same side view, and (C) is the same perspective view. FIG. 2 is a cross-sectional view of the sonar dome mounting structure of the first embodiment. FIG. 7 is a cross-sectional view of a sonar dome mounting structure according to a second embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
First, a first embodiment will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, a transducer 12 is installed on the bottom 10 of the ship, and a sonar dome 14 is provided to cover the transducer 12.
As shown in FIG. 3, the sonar dome 14 includes a sonar dome main body 16 and filler rubber 18.

The sonar dome main body 16 is attached to the ship's bottom 10 along its entire circumference, maintains the shape of the sonar dome 14, and also covers the periphery of the transducer 12.
The sonar dome body 16 is made of FRP (Fiber Reinforced Plastics) and has an inner surface 1602 facing the transducer 12 and an outer surface 1604 facing away from the transducer 12.

As shown in FIG. 2, the sonar dome main body 16 has an elongated shape along the extending direction of the ship, and as shown in FIG. Its outline is formed by a circular arc portion and two mutually opposing linear portions that connect both ends of the semicircular arc portion.
Further, as shown in FIG. 2(B), the height of the sonar dome main body 16 when viewed from the side is formed such that the height is the largest at the center in the length direction and gradually becomes smaller toward both ends. Although not shown, the height of the sonar dome main body 16 when viewed from the length direction is the highest at the center in the width direction, and gradually decreases toward the outside in the width direction.

As shown in FIG. 3, the edge of the sonar dome body 16 is formed with a bead portion 20 having a circular cross section and an outer diameter larger than the wall thickness of the sonar dome body 16.
The bead portion 20 is provided around the entire edge of the sonar dome body 16.
Further, a curved portion 2002 is provided at the boundary between the bead portion 20 and the sonar dome body 16, and the curved portion 2002 continuously connects the lower part of the bead portion 20 and the upper portion of the sonar dome body 16. The section 20 includes a curved section 2002.
A core material 22 made of a flexible material and having a circular cross section is embedded in the center of the bead portion 20 , and the core material 22 extends over the entire length of the bead portion 20 .
As the core material 22, various conventionally known flexible materials can be used, such as rubber, a wire covered in a circular shape with rubber, and a rope made of synthetic fibers covered in a circular shape with rubber.

Further, in this embodiment, a viscoelastic layer 24 made of a viscoelastic material that covers the surface of the bead portion 20 is provided around the entire circumference of the bead portion 20 .
This viscoelastic layer 24 is provided so as to cover from the surface of the bead portion 20 to an inner surface 1602 and an outer surface 1604, which are both surfaces in the thickness direction of a portion of the sonar dome body 16 near the bead portion 20.
The thickness of the viscoelastic body layer 24 is uniform, and the viscoelastic body layer 24 is provided from the entire circumference of the bead portion 20 to the entire circumference of both sides of the sonar dome body 16 in the vicinity of the bead portion 20 in the thickness direction. There is.
As the viscoelastic body, conventionally known polymer substances (polymer compounds) having viscoelasticity such as rubber and urethane can be used.

The filler rubber 18 is joined to a portion of the outer surface 1604 of the sonar dome body 16 near the bead portion 20, and extends over the entire circumference of the outer surface 1604 near the bead portion 20.
The filler rubber 18 has an inner surface 1802 joined to a portion of the outer surface 1604 of the sonar dome body 16 near the bead portion 20, an outer surface 1804 on the opposite side thereof, and an upper surface 1806 facing upward.
The filler rubber 18 is formed so that its thickness, which is the dimension between the inner surface 1802 and the outer surface 1804, gradually increases as it approaches the bead portion 20, in order to increase the pressure resistance of the sonar dome body 16. The filler rubber 18 has the maximum thickness at the location.
Note that the inner surface 1802 of the filler rubber 18 and the outer surface 1604 of the sonar dome body 16 near the bead portion 20 may be bonded using an adhesive, or a Optionally, the filler rubber 18 may be placed together with a bead sheet 32, which will be described later, and the inner surface 1802 of the filler rubber 18 and the outer surface 1804 of the bead sheet 32 may be integrally joined during vulcanization.

The sonar dome 14 is attached to the bottom 10 of the ship via a mounting member 30, a bead seat 32, and a bead clamp 34.
The attachment member 30 is a plate-shaped member attached to the bottom 10 of the ship, and extends in the shape of an elongated frame around the transducer 12 along the planar shape of the sonar dome 14 .
The attachment member 30 is made of metal or synthetic resin.
The attachment member 30 may be integrally molded in the shape of an elongated frame, or may be constructed by combining a plurality of divided bodies in the extending direction.

The bead sheet 32 extends in an elongated frame shape corresponding to the shape of the bead portion 20 in plan view.
The bead sheet 32 is made of metal or synthetic resin.
The bead sheet 32 may be integrally molded in the shape of an elongated frame, or may be formed by combining a plurality of divided bodies divided in the extending direction.
The bead sheet 32 includes an upper surface 3202 facing upward, a lower surface 3204 facing downward, an inner surface 3206 facing the transducer 12, and an outer surface 3208 facing away from the transducer 12.

Female threads 3210 are formed at multiple locations spaced apart in the extending direction of the upper surface 3202 of the bead seat 32 .
Then, the upper surface 3202 is aligned with the lower surface of the mounting member 30, and the bolt B1 inserted through the bolt insertion hole 3002 of the mounting member 30 is screwed into the female thread 3210, so that the bead seat 32 is attached to the outer edge of the lower surface of the mounting member 30. It is attached all around the vicinity.
The outer surface 3208 of the bead sheet 32 is formed with a horizontally oriented surface.
Further, the upper portion of the filler rubber 18 is attached to the bead sheet 32.
In this embodiment, the upper surface 1806 of the filler rubber 18 is bonded to the lower surface 3204 of the bead sheet 32.
The outer surface 3208 of the bead sheet 32 and the outer surface 1804 of the filler rubber 18 are connected in a continuous manner to prevent resistance from occurring at the boundary between the bead sheet 32 and the filler rubber 18 during navigation.
Note that the lower surface 3204 of the bead sheet 32 and the upper surface 1806 of the filler rubber 18 may be joined using an adhesive, or the filler rubber 18 before vulcanization may be placed inside a mold for vulcanization on the bead sheet. 32 and integrally joined to the lower surface 3204 of the bead sheet 32 and the upper surface 1806 of the filler rubber 18 during vulcanization.
Note that the shape of the bead sheet 32 and the shape of the upper part of the filler rubber 18 change depending on the layout of the bead sheet 32 and the bead clamp 34, and the attachment structure between the upper part of the filler rubber 18 and the bead sheet 32 changes accordingly. The attachment structure between the upper portion of the filler rubber 18 and the bead sheet 32 is not limited to the connection in the embodiment.

The inner surface 3206 of the bead seat 32 is formed with an inclined surface facing diagonally downward.
Female threads 3212 are formed at a plurality of locations spaced apart in the extending direction of the inner surface 3206 at the upper part of the inner surface 3206.
A clamping recess 36 for clamping the bead portion 20 is formed in the lower part of the inner surface 3206 over the entire length of the inner surface 3206 in the extending direction.
The clamping recess 36 is connected to a bead clamping recess 3602 having a semicircular cross section and a lower end of the bead clamping recess 3602 for clamping the bead 20 together with the viscoelastic layer 24 and a lower surface 3204. It is formed with a lower holding recess 3604 of a certain depth that is open to the upper side and holds the upper part of the sonar dome body 16 together with the viscoelastic layer 24 .
Note that the boundary between the bead portion clamping recess 3602 and the lower clamping recess 3604 is formed as a curved clamping recess 3606 with a curved cross section for connecting these recesses in a continuous manner and clamping the curved part 2002. In this embodiment, the bead portion holding recess 3602 includes a curved holding recess 3606.

The bead clamp 34 extends around the entire circumference of the inner surface 3206 of the bead seat 32.
The bead clamp 34 is made of metal or synthetic resin.
The bead clamp 34 may be integrally molded into an elongated frame shape corresponding to the shape of the bead sheet 32 in plan view, or may be formed by combining a plurality of divided bodies divided in the extending direction. You can leave it there.
The bead clamp 34 includes an upper surface 3402 facing diagonally upward, a lower surface 3404 facing downward, an inner surface 3406 facing the transducer 12, and an outer surface 3408 facing away from the transducer 12. .

The inner surface 3206 of the bead clamp 34 is formed with an inclined surface facing diagonally downward.
Bolt insertion holes 3412 penetrating from the inner surface 3206 toward the outer surface 3408 are formed at multiple locations spaced apart in the extending direction of the upper portion of the inner surface 3206.
The outer surface 3408 of the bead clamp 34 is formed with an inclined surface facing diagonally upward.
A clamping recess 38 for clamping the bead portion 20 in cooperation with the clamping recess 36 of the bead sheet 32 is formed at the lower part of the outer surface 3408 over the entire length of the outer surface 3408 in the extending direction.
The clamping recess 38 is connected to a bead clamping recess 3802 having a semicircular cross section and a lower end of the bead clamping recess 3802 for clamping the bead 20 together with the viscoelastic layer 24 and a lower surface 3404. It is formed with a lower holding recess 3804 of a certain depth that is open to the upper side of the sonar dome body 16 and holds the upper part of the sonar dome body 16 together with the viscoelastic layer 24 .
Note that the boundary between the bead portion holding recess 3802 and the lower holding recess 3804 is a curved holding recess with a curved cross section for connecting the recesses 3802 and 3804 in a continuous manner and holding the curved portion 2002. 3806, and in this embodiment, the bead portion holding recess 3602 includes a curved holding recess 3806.

Then, the bead portion 20 of the sonar dome body 16 including the viscoelastic layer 24 and the portion of the sonar dome body 16 near the bead portion 20 are aligned with the clamping recess 36 of the bead sheet 32, and the clamping recess 38 of the bead clamp 34 The outer surface 3408 of the bead clamp 34 is attached to the inner surface 3206 of the bead seat 32 so as to cover the bead portion 20 of the sonar dome body 16 including the viscoelastic layer 24, the curved portion 2002, and the portion of the sonar dome body 16 near the bead portion 20. The bead clamp 34 is attached to the bead seat 32 by threading the plurality of bolts B2, which are matched together and inserted through each bolt insertion hole 3412 of the bead clamp 34, into each internal thread 3212 on the inner surface 3206 of the bead seat 32.
With the bead clamp 34 attached to the bead seat 32 by the plurality of bolts B2 in this manner, the bead portion 20 including the viscoelastic layer 24 is connected to the bead clamping recesses 3602 and 3802 of the bead seat 32 and the bead clamp 34. The upper part of the sonar dome body 16 is clamped and fixed between the bead seat 32 and the lower clamping recesses 3604 and 3804 of the beat clamp.
That is, the entire circumference of the edge of the sonar dome body 16 is attached to the bottom 10 via the bead seat 32 and bead clamp 34.
Note that it is optional to provide a fairing plate that connects the attachment member 30 and the bead seat 32 continuously to the bottom 10 of the ship.

Next, the functions and effects of the sonar dome 14 mounting structure of this embodiment will be explained.
In the sonar dome 14 of the present embodiment, the sonar dome main body 16 is made of FRP, which is advantageous in preventing deformation of the sonar dome main body 16 even during high-speed sailing. This is advantageous in suppressing resistance.
In addition, since the bead portion 20 for attaching the sonar dome 14 is provided around the entire edge of the sonar dome body 16, the bead portion 20 is provided at the clamping recesses 36 and 38 of the bead seat 32 and bead clamp 34 as in the embodiment. 20 is advantageous in easily and reliably attaching the sonar dome 14 to the bottom 10 of the ship.
Furthermore, since the bead sheet 32 for attaching the sonar dome 14 is used as an attachment part for the upper part of the filler rubber 18, the attachment structure of the filler rubber 18 to the sonar dome main body 16 can be realized without providing any special member. It can be made strong, which is advantageous in preventing the filler rubber 18 from peeling off from the sonar dome body 16 during high-speed navigation, and is advantageous in improving the durability of the sonar dome 14.

Furthermore, in this embodiment, the upper portion of the filler rubber 18 is attached to the bead sheet 32 by joining the upper surface 1806 of the filler rubber 18 to the lower surface 3204 of the bead sheet 32.
Here, the upper surface 1806 of the filler rubber 18 is provided at a location where the filler rubber 18 has the greatest thickness and has a large area.
Therefore, since the upper surface 1806 of the filler rubber 18, which has a large area, is bonded to the lower surface 3204 of the bead sheet 32, a large bonding area can be ensured, and it is possible to prevent the filler rubber 18 from peeling off from the sonar dome body 16 during high-speed navigation. This is advantageous in terms of improving the durability of the sonar dome 14.
In addition, in this embodiment, since the flexible core material 22 is embedded in the center of the bead portion 20, the bead portion 20 is more easily deformed than when the entire bead portion 20 is formed of FRP. Therefore, the bead portion 20 can be deformed when attached to the boat bottom 10, which is advantageous in easily and reliably attaching the sonar dome 14 to the boat bottom 10.

Further, the sonar dome 14 may be directly held between the bead seat 32 and the holding recesses 36 and 38 of the bead clamp 34, but in that case, the surface of the bead portion 20 having hardness and the bead portion having hardness The surfaces of the recesses 3602 and 3802 come into contact with each other.
In this embodiment, since the viscoelastic layer 24 is provided to cover the surface of the bead portion 20, the hard surface of the bead portion 20 and the hard surface of the bead portion holding recesses 3602 and 3802 are There is no direct contact.
That is, since the surface of the bead portion 20 having hardness and the surface of the bead portion holding recesses 3602 and 3802 having hardness contact each other with the viscoelastic layer 24 interposed, the bead portion 20 when attached to the sonar dome is This is advantageous in preventing damage to the portion 20, and therefore the sonar dome 14 can be easily attached, which is advantageous in increasing the durability of the sonar dome 14.

Furthermore, since not only the bead portion 20 but also the portion of the sonar dome body 16 near the bead portion 20 is held between the bead seat 32 and the bead clamp 34, the sonar dome body 16 can be held more reliably, and the sonar dome 14 can be attached to the bottom 10 of the ship. This is advantageous for easy and reliable installation.
In this case, since the viscoelastic layer 24 is also provided on both sides in the thickness direction of the sonar dome body 16 near the bead portion 20, the surface of the lower clamping recesses 3604, 3804 having hardness and the hardness The surface of the sonar dome body 16 does not come into direct contact with the surface of the sonar dome body 16.
That is, since the hard surfaces of the lower holding recesses 3604 and 3804 come into contact with the hard inner surfaces 1602 and outer surfaces 1604 of the sonar dome main body 16, this is advantageous in securely attaching the sonar dome 14 to the ship's bottom 10. At the same time, this is advantageous in preventing damage to the portion of the sonar dome body 16 near the bead portion 20 when the sonar dome is attached, making it easier to attach the sonar dome 14 and increasing the durability of the sonar dome 14. It will be advantageous.

Furthermore, it is known that filling the space inside the sonar dome 14 with fluid and applying pressure to the fluid is advantageous in improving the performance of the transducer 12. When pressure is applied to the filled fluid, a downward pulling force acts on the bead portion 20.
In such a case, since the viscoelastic layer 24 is interposed when the lower half of the bead portion 20 comes into contact with the lower half of the bead portion holding recesses 3602 and 3802, the lower half of the bead portion 20 having hardness There is no direct contact between the surfaces of the lower halves of the hard bead holding recesses 36 and 38.
That is, even when pressure is applied to the fluid filling the space inside the sonar dome 14, the lower half of the bead portion 20 having hardness and the lower half of the bead portion holding recesses 36 and 38 having hardness maintain viscosity. Since they abut with the elastic layer 24 interposed therebetween, this is advantageous in preventing damage to the bead portion 20 and is advantageous in increasing the durability of the sonar dome 14.
Note that it is also possible to use an elastic layer made of an elastic material instead of the viscoelastic layer 24, but since the viscoelastic layer 24 has increased sealing performance, it is more advantageous than the elastic layer.

Next, a second embodiment will be described with reference to FIG. 4.
In the following embodiments, the same parts and members as in the first embodiment are given the same reference numerals, and their explanations are omitted, and the explanation will focus on the parts that are different from the first embodiment. do.
The second embodiment differs from the first embodiment in that the lower surface 3204 of the bead sheet 32 and the upper surface 1806 of the filler rubber 18 are provided with an uneven structure 40 that fits into each other.
That is, the upper surface 1806 of the filler rubber 18 is provided with an uneven portion 4004 that fits into the uneven portion 4002 on the lower surface 3204 of the bead sheet 32.
In this embodiment, a recess is used as the uneven portion 4002 of the lower surface 3204 of the bead sheet 32, and the recess extends over the entire length of the lower surface 3204.
Furthermore, a convex portion is used as the uneven portion 4004 on the top surface 1806 of the filler rubber 18, and the convex portion extends over the entire length of the top surface 1806 of the filler rubber 18.

Therefore, the uneven portion 4002 on the lower surface 3204 of the bead sheet 32 and the uneven portion 4004 on the upper surface 1806 of the filler rubber 18 form an uneven structure 40 that fits into each other.
According to the second embodiment, the uneven portion 4002 of the lower surface 3204 of the bead sheet 32 and the uneven portion 4004 of the upper surface 1806 of the filler rubber 18 fit together, so that the lower surface 3204 of the bead sheet 32 and the filler This is advantageous in maintaining the bonded state of the rubber 18 with the upper surface 1806 more firmly, and is more advantageous in preventing the filler rubber 18 from peeling off from the sonar dome body 16 during high-speed navigation.
Note that in this embodiment, a case has been described in which the uneven portions 4002 and 4004 are composed of a recessed portion with a rectangular cross section and a convex portion with a rectangular cross section, but the cross-sectional shape of the uneven portions 4002 and 4004 is semicircular. It is possible to adopt various conventionally known structures without being limited to rectangular shapes, such as a rectangular structure.Also, in this embodiment, the case where the number of uneven portions is one is described, but a plurality of uneven portions may be provided. Alternatively, the concave portion may be provided on the filler rubber 18 side, and the convex portion may be provided on the bead sheet 32 side.

Further, in the first and second embodiments, the viscoelastic layer 24 is formed on the surface of the bead portion 20 or on both sides of the sonar dome body 16 in the thickness direction from the surface of the bead portion 20 to the portion of the sonar dome body 16 in the vicinity of the bead portion 20. In the above description, the viscoelastic layer 24 may be attached in advance to the surfaces of the clamping recesses 36 and 38 of the bead sheet 32 and the bead clamp 34, or the viscoelastic layer 24 may It is provided in a sheet shape in advance, and when the sonar dome 14 is assembled, this sheet-like viscoelastic layer 24 is placed between the surface of the bead portion 20 and the surfaces of the clamping recesses 36 and 38, and It may be held between the surface and the surfaces of the holding recesses 36 and 38.
However, as in the embodiment, the viscoelastic layer 24 is attached in advance to the surface of the bead portion 20 and to both surfaces of the sonar dome body 16 in the thickness direction from the surface of the bead portion 20 to the vicinity of the bead portion 20. This is advantageous for efficiently assembling the sonar dome 14.

10 Bottom 12 Transducer 14 Sonar dome 16 Sonar dome body 18 Filler rubber 1806 Top surface 20 Bead portion 22 Core material 24 Viscoelastic layer 30 Attachment member 32 Bead sheet 34 Bead clamps 36, 38 Clamping recesses 3602, 3802 Bead portion clamping Recesses 3604, 3804 Lower clamping recess

Claims (7)

A sonar dome body whose entire edge is attached to the bottom of the ship and has an inner surface that faces the wave transducer disposed on the ship bottom and covers the periphery of the wave transmitter/receiver, and a portion of the sonar dome body near the edge. A sonar dome mounting structure comprising: a filler rubber bonded to an outer surface facing away from the transducer;
The sonar dome body is made of FRP,
The edge portion is formed by a bead portion having a circular cross section and having an outer diameter larger than the wall thickness of the sonar dome body;
The bead portion is held between a holding recess of a bead seat supported on the bottom of the boat and a holding recess of a bead clamp that is detachably coupled to the bead seat,
an upper portion of the filler rubber is attached to the bead sheet;
The sonar dome mounting structure is characterized by: The upper part of the filler rubber attached to the bead sheet is an upwardly facing upper surface of the filler rubber,
The upper part of the filler rubber is attached to the bead sheet by joining the upper surface to a downwardly facing lower surface of the bead sheet.
The sonar dome mounting structure according to claim 1, characterized in that: The lower surface of the bead sheet and the upper surface of the filler rubber are provided with an uneven structure that fits into each other.
The sonar dome mounting structure according to claim 2, characterized in that: The bead sheet has an inner surface facing the transducer and provided with the holding recess, and an outer surface facing away from the transducer,
The filler rubber has an inner surface joined to the outer surface of the sonar dome body, and an outer surface facing away from the outer surface of the sonar dome body,
The upper surface connects the upper end of the inner surface and the upper end of the outer surface,
The outer surface of the bead sheet and the outer surface of the filler rubber are continuous;
The sonar dome mounting structure according to claim 2 or 3, characterized in that: A core material made of a flexible material is embedded in the center of the bead portion.
The sonar dome mounting structure according to any one of claims 1 to 4, characterized in that: A viscoelastic layer made of a viscoelastic material is provided,
The bead portion is held between the holding recess of the bead sheet and the holding recess of the bead clamp with the viscoelastic layer interposed therebetween.
The sonar dome mounting structure according to any one of claims 1 to 5, characterized in that: The viscoelastic layer covers both surfaces of the sonar dome body in the vicinity of the bead portion in the thickness direction from the surface of the bead portion,
The bead portion and a portion of the sonar dome body near the bead portion are held between the holding recess of the bead sheet and the holding recess of the bead clamp with the viscoelastic layer interposed therebetween. ing,
7. The sonar dome mounting structure according to claim 6.

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