CN116380028B - Ocean engineering water area mapping device and application method thereof - Google Patents
Ocean engineering water area mapping device and application method thereof Download PDFInfo
- Publication number
- CN116380028B CN116380028B CN202310360370.5A CN202310360370A CN116380028B CN 116380028 B CN116380028 B CN 116380028B CN 202310360370 A CN202310360370 A CN 202310360370A CN 116380028 B CN116380028 B CN 116380028B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000013507 mapping Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000013535 sea water Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a marine engineering water area mapping device and a use method thereof, wherein the marine engineering water area mapping device comprises a measuring box, the measuring box is connected with a mapping mechanism, the measuring box is fixedly connected with a water suction pump, one end of the water suction pump is connected with a water suction port, one end of the water suction port is positioned at the outer side of the measuring box, and the other end of the water suction pump is connected with a water inlet pipe; a plurality of water containing cavities are formed in the measuring box, the water containing cavities are communicated with a drain pipe, and a water inlet pipe is communicated with the water containing cavities; the piston is connected in the water holding cavity in a sliding way, the upper end of the piston is connected with the measuring box through a first spring, and the drain pipe and the water inlet pipe are positioned below the piston. The device can adaptively adjust the overall quality of the surveying and mapping device according to the magnitude of wind power, the larger the wind power is, the higher the overall quality of the device is, so that the volume of the device which is wholly submerged into water is increased, the influence of the wind power on a surveying and mapping instrument is reduced, and the surveying and mapping efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of ocean mapping, in particular to an ocean engineering water area mapping device and a using method thereof.
Background
Ocean engineering is a new construction, reconstruction, and extension project for developing, utilizing, protecting, and recovering ocean resources, and the main engineering body is located at the side of coastline facing the sea, and the main content of ocean engineering is generally considered to be divided into two major parts, namely resource development technology and equipment facility technology, specifically including: the construction of sea reclamation, sea dyke engineering, artificial islands, offshore and submarine material storage facilities, cross-sea bridges, submarine tunnel engineering, submarine pipeline engineering and the like.
In the ocean engineering construction process, the surveying instrument is usually utilized to survey and draw the topography of the water surface on the sea level, and the surveying instrument floats on the horizontal plane mostly during surveying and drawing, however, during actual measurement, wind can be blown above the sea surface, different wind forces can blow the surveying instrument to fly different positions back and forth, and the back-and-forth-floating surveying instrument can lead to inaccurate surveying and drawing. In general, in order to guarantee the accuracy of surveying instrument survey, the staff needs frequent manual control surveying instrument position, also has great potential safety hazard when extravagant manpower, has brought inconvenience for ocean engineering's survey work, perhaps increases the holistic quality of surveying instrument through increasing the balancing weight, but it has the transportation unchangeable, inconvenient operation's problem.
Disclosure of Invention
In order to solve the problems in the prior art, the marine engineering water area mapping device and the use method thereof are provided.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a marine engineering water area mapping device which comprises a measuring box, wherein the measuring box is connected with a mapping mechanism, the measuring box is fixedly connected with a water suction pump, one end of the water suction pump is connected with a water suction port, one end of the water suction port is positioned at the outer side of the measuring box, and the other end of the water suction pump is connected with a water inlet pipe; a plurality of water containing cavities are formed in the measuring box, the water containing cavities are communicated with a drain pipe, and the water inlet pipe is communicated with the water containing cavities; the water holding cavity is slidably connected with a piston, the upper end of the piston is connected with the measuring box through a first spring, and the water draining pipe and the water inlet pipe are located below the piston.
Preferably, the water pump comprises a rotating shaft for driving the water pump to work, the rotating shaft is arranged in the vertical direction, and the rotating shaft is rotationally connected with the measuring box.
Preferably, the upper end of the rotating shaft penetrates out of the measuring box and is fixedly connected with a bracket, and the bracket is connected with a plurality of wind cups.
Preferably, the measuring box is fixedly connected with an overflow pipe arranged in the vertical direction, the lower end of the overflow pipe penetrates out of the measuring box, and the upper end of the overflow pipe is communicated with the drain pipe.
Preferably, the rotating shaft is provided with a plurality of sliding grooves, an arc-shaped pushing block is connected in the sliding grooves in a sliding mode, and the arc-shaped pushing block is connected with the rotating shaft through a tension spring.
Preferably, the measuring box is further connected with a sliding rod moving in the horizontal direction in a sliding manner, one end of the sliding rod is located in the overflow pipe, and the other end of the sliding rod is located on one side of the arc-shaped pushing block.
Preferably, the sliding rod is sleeved with a second spring, one end of the second spring is connected with the measuring box, and the other end of the second spring is connected with the sliding rod.
Preferably, the overflow pipe is provided with a sliding hole, the sliding rod penetrates through the sliding hole in a sliding mode, one end of the sliding rod, located in the overflow pipe, is fixedly connected with a stop block, and a sealing gasket is arranged at the contact position of the sliding hole and the sliding rod.
Preferably, the second spring has an elastic force smaller than that of the tension spring.
The invention also provides a using method of the marine engineering water area mapping device, which comprises the following steps:
under the action of the mapping mechanism, corresponding mapping work in the water area is realized, and when the weather of strong wind is met, the strong wind drives the rotating shaft to rotate through the wind cup;
the rotating shaft rotates to drive the water suction pump to work, the water suction pump pumps seawater into the water containing cavity through the water suction port, and meanwhile, the rotating shaft drives the arc-shaped pushing block to do circular motion;
the arc-shaped pushing block stretches the tension spring in the moving process, one end of the sliding rod is pushed to move into the overflow pipe in the moving process of the arc-shaped pushing block, the second spring is deformed at the moment, so that the flow rate of the overflow pipe is changed, the adjustment work of the water quantity in the water containing cavity is realized, and the piston moves upwards at the moment, so that the first spring is compressed;
the greater the wind force, the faster the rotating speed of the rotating shaft, the faster the pumping speed, the longer the stretched length of the tension spring, the longer the distance between the arc-shaped push block and the rotating shaft, the longer the length of the push sliding rod moving into the overflow pipe, the longer the distance the piston moves upwards, the more the water quantity in the water containing cavity, and the heavier the whole mass of the measuring box.
Compared with the prior art, the invention has the beneficial effects that:
1. the wind cup is arranged, the wind cup can drive the rotating shaft to rotate under the action of wind force, so that the water suction pump works, the water suction pump can pump seawater into the water holding cavity, the overall mass of the device is increased, the volume of the measuring box which is wholly submerged into water is increased, the influence of wind force on a surveying instrument is reduced, and meanwhile, when the wind cup is not used, the water in the water holding cavity is drained, the overall mass of the device can be effectively reduced, the device is convenient to carry and transport, and the convenience of operation is improved.
2. The invention is provided with the arc-shaped pushing block, the higher the wind power is, the faster the rotating speed of the rotating shaft is, the larger the distance between the arc-shaped pushing block and the rotating shaft is, the more length of the sliding rod which moves into the overflow pipe can be driven, so that the flow rate of the overflow pipe can be adjusted, the water outlet speed is adjusted, the more the distance of the upward movement of the piston is pushed, the water quantity in the water containing cavity can be adjusted, the whole quality of the surveying and mapping device can be adaptively adjusted according to the magnitude of the wind power, the larger the wind power is, the higher the whole quality of the device is, the more the whole volume of the device which is immersed into water is, thereby reducing the influence of the wind power on the surveying and mapping instrument and effectively improving the surveying and mapping efficiency.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a front view of the whole of the present invention;
FIG. 2 is an enlarged view of the structure of the portion K in FIG. 1;
FIG. 3 is a schematic view of the portion A-A of FIG. 2.
Reference numerals illustrate:
1, a measuring box; 2, a water pump; 3, a water inlet pipe; 4, a water containing cavity; 5, a piston; 6, draining pipe; 7, a first spring; 8, a water pumping port; 9, rotating shaft; 10 wind cups; 11 slide bars; 12 overflow pipe; 13 a second spring; 14 arc pushing blocks; a 15 tension spring; 16 stops.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 1-3, this embodiment provides a marine engineering waters mapping device, including measuring box 1, measuring box 1 is connected with the surveying instrument, and the surveying instrument can be specifically for marine surveying instrument commonly used, in practical application, can be according to the project difference of needs survey, selects suitable surveying instrument.
The measuring box 1 is fixedly connected with the water suction pump 2, and water suction pipe 2 one end is connected with the water suction pipe, and the water suction pipe lower extreme is including water pumping mouth 8, and water pumping mouth 8 lower extreme is located measuring box 1 outside, and water pumping mouth 8 is located measuring box 1 bottom's outside, can play the effect of being convenient for draw water.
The other end of the water suction pump 2 is connected with a water inlet pipe 3, a plurality of water containing cavities 4 are formed in the measuring box 1, the water containing cavities 4 are communicated with a water outlet pipe 6, the water inlet pipe 3 is communicated with the water containing cavities 4, and water pumped by the water suction pump 2 can be pumped into the water containing cavities 4 through the water inlet pipe 3.
The water holding cavity 4 is connected with a piston 5 in a sliding way, the upper end of the piston 5 is connected with the measuring box 1 through a first spring 7, and the water draining pipe 6 and the water inlet pipe 3 are positioned below the piston 5.
The first spring 7 is located the top of piston 5, and first spring 7 upper end links to each other with measuring box 1, and the lower extreme of first spring 7 links to each other with piston 5, and first spring 7 is used for the work that resets of piston 5, and under the effect of first spring 7 in the initial state, piston 5 is located the lower extreme of flourishing water cavity 4, and piston 5 and flourishing water cavity 4 bottom leave suitable distance this moment, and piston 5 is located the upper end of overflow pipe 12 this moment to the water of being convenient for.
The water pump 2 includes a rotation shaft 9 for driving the water pump 2 to work, and the rotation shaft 9 is an inherent mechanism of the water pump 9, so that not described in any more detail herein, when the rotation shaft 9 rotates, the water pump 2 can be driven to work, the rotation shaft 9 is arranged in a vertical direction, and the rotation shaft 9 is rotationally connected with the measuring box 1.
The upper end of the rotating shaft 9 penetrates out of the measuring box 1 and is fixedly connected with a support, the support is connected with a plurality of wind cups 10, the wind cups 10 can be replaced by wind vanes or other related structures, when the wind is in heavy wind weather, the wind cups 10 can be blown by heavy wind, so that the rotating shaft 9 can be driven to rotate, and the rotating speed of the rotating shaft 9 is faster as the wind force is larger.
The measuring box 1 is fixedly connected with an overflow pipe 12 arranged in the vertical direction, the lower end of the overflow pipe 12 penetrates out of the measuring box 1, and the upper end of the overflow pipe 12 is communicated with the drain pipe 6.
The drain pipe 6 is arranged in the horizontal direction, and water in the measuring box 1 can be discharged through the drain pipe 6 and the overflow pipe 12, so that the water draining work in the water containing cavity 4 can be realized.
The rotating shaft 9 is provided with a plurality of sliding grooves, the sliding grooves are connected with arc-shaped pushing blocks 14 in a sliding mode, and the arc-shaped pushing blocks 14 are connected with the rotating shaft 9 through tension springs 15.
The spout can be offered a plurality of according to actual need, and arc ejector pad 14 is including a guide bar and an arc piece, and wherein guide bar and spout sliding connection, arc piece are located the outside of pivot 9, and when pivot 9 rotated, can drive arc ejector pad 14 and rotate, and under centrifugal force effect, can drive the arc piece to the direction removal of keeping away from pivot 9, and wherein the faster the rotational speed, the more the distance of arc piece and pivot 9 just also is far away.
The measuring box 1 is also connected with a sliding rod 11 which moves in the horizontal direction in a sliding manner, one end of the sliding rod 11 is positioned in the overflow pipe 12, the other end of the sliding rod 11 is positioned on one side of an arc-shaped pushing block 14, the arc-shaped block is matched with the sliding rod 11, and when the arc-shaped block rotates, the arc-shaped block can drive the sliding rod 11 to slide.
The slide bar 11 is sleeved with a second spring 13, one end of the second spring 13 is connected with the measuring box 1, and the other end of the second spring 13 is connected with the slide bar 11.
The overflow pipe 12 is provided with a sliding hole, the sliding rod 11 penetrates through the sliding hole in a sliding way, one end of the sliding rod 11 positioned in the overflow pipe 12 is fixedly connected with a stop block 16, and a sealing gasket is arranged at the contact part of the sliding hole and the sliding rod 11.
The stopper 16 can limit the movement of the slide bar 11, the stopper 16 is always positioned in the overflow pipe 12, and the width of the stopper 16 and the slide bar 11 is larger than the aperture of the slide hole, so that the stopper 16 cannot move out of the overflow pipe 12, thereby preventing the slide bar 11 from completely separating from the overflow pipe 12.
The second spring 13 is used for resetting the slide bar 11, under the action of the second spring 13 in an initial state, the stop block 16 and the overflow pipe 12 are in a contact state, when the arc-shaped push block 14 rotates, the slide bar 11 can be driven to move into the overflow pipe 12, the longer the slide bar 12 moves into the overflow pipe 12, the smaller the water yield of the overflow pipe 12 is, the adjustment of the water yield can be realized, and the adjustment of the water yield in the water containing cavity 4 is further realized.
The elasticity of the second spring 13 is smaller than the elasticity of the tension spring 15, so that the arc-shaped pushing block 14 can drive the sliding rod 11 to move in a direction away from the rotating shaft 9, meanwhile, the second spring 13 is deformed, and in addition, the elasticity of the first spring 7 is proper enough, so that the movement of the sliding rod 11 is not influenced.
The invention also provides a using method of the marine engineering water area mapping device, which further comprises the marine engineering water area mapping device and comprises the following steps:
under the action of a mapping mechanism, corresponding mapping work in the water is realized, and when the weather of strong wind is met, the strong wind drives the rotating shaft 9 to rotate through the wind cup 10;
the rotating shaft 9 rotates to drive the water suction pump 2 to work, the water suction pump 2 pumps seawater into the water containing cavity 4 through the water suction port 8 and simultaneously the rotating shaft 9 drives the arc-shaped pushing block 14 to do circular motion;
the arc-shaped push block 14 stretches the tension spring 15 in the moving process, one end of the sliding rod 11 is pushed to move into the overflow pipe 12 in the moving process of the arc-shaped push block 14, at the moment, the second spring 13 deforms, so that the flow rate of the overflow pipe 12 is changed, the adjustment work of the water quantity in the water containing cavity 4 is realized, at the moment, the piston 5 moves upwards, and the first spring 7 is compressed;
the greater the wind force, the faster the rotating speed of the rotating shaft 9, the faster the water pumping speed, the longer the stretched length of the tension spring 15, the longer the distance between the arc-shaped push block 14 and the rotating shaft 9, the longer the length of pushing the slide rod 11 into the overflow pipe 12, the longer the upward moving distance of the piston 5, the more the water amount in the water containing cavity 4, and the heavier the whole mass of the measuring box 1.
It should be noted that, under the effect of wind force, the wind cup 10 can drive the pivot 9 and rotate to make suction pump 2 work, suction pump 2 can draw sea water into flourishing water cavity 4, thereby increase the holistic quality of device, make the volume that measurement box 1 wholly sink into the aquatic just more, thereby reduce the influence of wind-force to the surveying instrument, simultaneously when not using, through draining the water in flourishing water cavity 4, can effectively alleviate holistic quality of device, portable and transportation, improve the convenience of operation.
In addition, the larger the wind power is, the faster the rotating speed of the rotating shaft 9 is, the larger the distance between the arc-shaped pushing block 14 and the rotating shaft 9 is, and the more length of the sliding rod 11 which moves into the overflow pipe 12 can be driven, so that the flow rate of the overflow pipe 12 can be adjusted, the water outlet speed can be adjusted, the more the distance of the piston 5 which moves upwards is pushed, the adjustment work of the water quantity in the water containing cavity 4 can be realized, the whole mass of the surveying and mapping device can be adaptively adjusted according to the size of the wind power, the larger the wind power is, the higher the whole mass of the device is, the more the volume of the whole device which is immersed into water is, and therefore the influence of the wind power on a surveying and mapping instrument is reduced, and the surveying and mapping efficiency is effectively improved.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. The utility model provides a marine engineering waters mapping device, includes measurement case (1), measurement case (1) is connected with mapping mechanism, its characterized in that, measurement case (1) fixedly connected with suction pump (2), suction pump (2) one end is connected with water pumping mouth (8), water pumping mouth (8) one end is located measurement case (1) outside, suction pump (2) other end is connected with inlet tube (3); a plurality of water containing cavities (4) are formed in the measuring box (1), the water containing cavities (4) are communicated with a drain pipe (6), and the water inlet pipe (3) is communicated with the water containing cavities (4); the water holding cavity (4) is connected with a piston (5) in a sliding manner, the upper end of the piston (5) is connected with the measuring box (1) through a first spring (7), and the water draining pipe (6) and the water inlet pipe (3) are positioned below the piston (5);
the water suction pump (2) comprises a rotating shaft (9) for driving the water suction pump (2) to work, the rotating shaft (9) is arranged in the vertical direction, and the rotating shaft (9) is rotationally connected with the measuring box (1);
the upper end of the rotating shaft (9) penetrates out of the measuring box (1) and is fixedly connected with a bracket, and the bracket is connected with a plurality of wind cups (10);
the measuring box (1) is fixedly connected with an overflow pipe (12) arranged in the vertical direction, the lower end of the overflow pipe (12) penetrates out of the measuring box (1), and the upper end of the overflow pipe (12) is communicated with the drain pipe (6);
the rotating shaft (9) is provided with a plurality of sliding grooves, an arc-shaped pushing block (14) is connected in a sliding manner in the sliding grooves, and the arc-shaped pushing block (14) is connected with the rotating shaft (9) through a tension spring (15);
the measuring box (1) is also connected with a sliding rod (11) which moves in the horizontal direction in a sliding way, one end of the sliding rod (11) is positioned in the overflow pipe (12), and the other end of the sliding rod (11) is positioned at one side of the arc-shaped pushing block (14);
the sliding rod (11) is sleeved with a second spring (13), one end of the second spring (13) is connected with the measuring box (1), and the other end of the second spring (13) is connected with the sliding rod (11);
the overflow pipe (12) is provided with a sliding hole, the sliding rod (11) penetrates through the sliding hole in a sliding mode, one end of the sliding rod (11) located in the overflow pipe (12) is fixedly connected with a stop block (16), and a sealing gasket is arranged at the contact position of the sliding hole and the sliding rod (11);
the elastic force of the second spring (13) is smaller than that of the tension spring (15).
2. A method of using a marine engineering water mapping apparatus as claimed in claim 1, comprising the steps of:
under the action of a mapping mechanism, corresponding mapping work in the water is realized, and when the weather of strong wind is met, the strong wind drives the rotating shaft (9) to rotate through the wind cup (10);
the rotating shaft (9) rotates to drive the water suction pump (2) to work, the water suction pump (2) pumps seawater into the water containing cavity (4) through the water suction port (8) through the water inlet pipe (3), and meanwhile, the rotating shaft (9) drives the arc-shaped pushing block (14) to do circular motion;
the arc-shaped pushing block (14) stretches the tension spring (15) in the moving process, one end of the sliding rod (11) is pushed to move into the overflow pipe (12) in the moving process of the arc-shaped pushing block (14), at the moment, the second spring (13) deforms, so that the flow rate of the overflow pipe (12) is changed, the adjustment of the water quantity in the water containing cavity (4) is realized, at the moment, the piston (5) moves upwards, and the first spring (7) is compressed;
the greater the wind force, the faster the rotating speed of the rotating shaft (9) is, the faster the water pumping speed is, the longer the stretched length of the tension spring (15) is, the longer the distance between the arc-shaped push block (14) and the rotating shaft (9) is, the longer the length of the push sliding rod (11) which is pushed to move into the overflow pipe (12) is, at the moment, the longer the upward moving distance of the piston (5) is, the more the water quantity in the water containing cavity (4) is, and the whole mass of the measuring box (1) is heavier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310360370.5A CN116380028B (en) | 2023-04-06 | 2023-04-06 | Ocean engineering water area mapping device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310360370.5A CN116380028B (en) | 2023-04-06 | 2023-04-06 | Ocean engineering water area mapping device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116380028A CN116380028A (en) | 2023-07-04 |
| CN116380028B true CN116380028B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310360370.5A Active CN116380028B (en) | 2023-04-06 | 2023-04-06 | Ocean engineering water area mapping device and application method thereof |
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| Country | Link |
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| CN (1) | CN116380028B (en) |
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| US6916219B2 (en) * | 2001-11-09 | 2005-07-12 | Apprise Technologies, Inc. | Remote sampling system |
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| Publication number | Publication date |
|---|---|
| CN116380028A (en) | 2023-07-04 |
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