CN111238960B - Acupuncture type corn stalk lodging strength rapid measuring instrument convenient to operate - Google Patents
Acupuncture type corn stalk lodging strength rapid measuring instrument convenient to operate Download PDFInfo
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- CN111238960B CN111238960B CN202010213802.6A CN202010213802A CN111238960B CN 111238960 B CN111238960 B CN 111238960B CN 202010213802 A CN202010213802 A CN 202010213802A CN 111238960 B CN111238960 B CN 111238960B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
The invention discloses a needle-punching type corn stalk lodging strength rapid tester convenient and fast to operate, which comprises a clamping operation mechanism directly contacting corn stalks, a pressure measurement mechanism connected with the clamping operation mechanism and a control mechanism packaged in the pressure measurement mechanism. Compared with the prior art, the acupuncture type corn stalk lodging strength rapid measuring instrument convenient to operate can rapidly measure corn stalks without bending, judges lodging resistance strength according to measured data, is exquisite and compact in structure, can be operated by one hand and two hands, has the functions of endurance and data real-time display of lithium batteries, and enables transmitted data to be faster and more stable due to Bluetooth connection. The unique stem stalk pressure measurement mechanism of structural design can change the acupuncture probe as required at any time. The penetration depth of the probe is controlled, the lodging strength evaluation of corn stalks with different diameters and varieties is met, the requirements of modern agricultural genetic breeding are met, and the probe has great market prospect and popularization value.
Description
Technical Field
The invention relates to the field of agricultural detection equipment, in particular to a needle-punching type corn stalk lodging strength rapid measuring instrument convenient to operate.
Background
Corn lodging is the result of the combined action of corn seed genetic factors and external environmental conditions, and the lodging plants can not carry out normal photosynthesis and even cause leaf decay. Corn lodging has a great influence on the yield, the yield is reduced by 10-20% in light lodging, 30-40% in moderate lodging and more than 50% in severe lodging. Therefore, a plurality of scholars at home and abroad are dedicated to the innovative research on the quality of the corn seeds and breed varieties with high lodging resistance strength. In the research of corn genetic breeding, scientists use parents as inbred line varieties, so that if the lodging resistance strength of corn stalks is not measured, a plurality of varieties with general expression can be selected as next parents, the speed of cultivating corn varieties with high lodging resistance strength is slower, and therefore, a small number of excellent varieties with high lodging resistance strength can be selected as next parents by a rapid corn stalk lodging resistance strength measuring instrument on the spot, and the speed of corn seed quality innovation is greatly accelerated.
When the instrument that has been used for detecting maize stalk lodging intensity carries out crop lodging resistance strength measurement again, the ubiquitous can only be artifical with the hand operation of drawing a bend, very hard waste time, the operation is used inconveniently and is unfavorable for carrying on defects such as multiple measurements, the urgent need is improved.
Disclosure of Invention
The invention aims to provide a needle-punching type corn stalk lodging strength rapid tester convenient to operate, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a acupuncture formula maize stem stalk lodging intensity rapid survey appearance of convenient operation, rapid survey appearance includes the clamping operation mechanism of direct contact maize stem stalk, the pressure measurement mechanism that is connected with clamping operation mechanism and encapsulates the control mechanism in pressure measurement mechanism, clamping operation mechanism is including setting up at the flat and downward hook of buckling of front end and two D type handguards of rear end, and the two is connected through buckling inner guide and outer guide from top to bottom between the two, and wherein the inner guide is located the top, the tail end of hook is equipped with a plurality of length adjustment mounting holes and through the front end fixed connection of bolt and inner guide, two the D type handguards are set up the rear end of inner guide through "nearly" style of calligraphy handguard mounting bracket, two the symmetry of D type handguards sets up in the both sides of inner guide;
the pressure measuring mechanism comprises a' line-shaped shell, a pressure measuring part packaged at the front part of the shell, a control mechanism packaged at the middle part of the shell and a lithium battery pack arranged at the rear part and used for supplying power to the control mechanism, and the shell is fixedly arranged below the outer guide rail and can move along the inner guide rail along with the clamping operation mechanism;
the pressure measurement component sequentially comprises a needling probe, a concave table with an arc-shaped end face, a drawing pressure sensor, a concave table guide shaft and a spring sleeved on the concave table guide shaft from top to bottom, the drawing pressure sensor is fixed on the control mechanism through a drawing pressure sensor fixing bolt, an opening is formed in the arc face of the concave table, the head of the needling probe extends out of the opening, a notch is formed in the middle of the concave table and sleeved on a shell of the drawing pressure sensor, holes are formed in downward extending parts on two sides of the concave table and are bilaterally symmetrical, the concave table guide shaft penetrates through the spring and then is inserted into the opening, so that the concave table can move along the direction of the drawing pressure sensor, the displacement distance of the concave table relative to the drawing pressure sensor is limited by the depth of the holes, the concave table is prevented from contacting with a stress surface of the drawing pressure sensor, the top end of the shell is provided with an opening, the needling probe in the pressure measurement component extends out of the opening, and when the pressure measurement mechanism is guided to the forefront end along an inner guide rail, the acupuncture probe is contacted with the corn stalks hooked by the hook, and the width of the concave platform exceeds the size of the opening of the shell, so that the concave platform is prevented from extending out of the shell;
preferably, the control mechanism comprises a main control circuit board, a liquid crystal display, a bluetooth circuit board and a touch keyboard circuit, the main control circuit board realizes the functions of measurement, conversion, calibration, storage, keyboard response and battery charging management, the measurement data and the operation menu are displayed on the liquid crystal display, the measurement data are transmitted through the bluetooth circuit board, and meanwhile, a user controls the tester through the touch keyboard circuit.
Preferably, the acupuncture probe comprises a probe head, a probe neck, a reinforcing conical surface, a probe supporting table, a rotating tool connecting hole and an M thread, wherein the probe head is hemispherical and is a stress surface for puncturing corn stalks; the probe neck is a round bar, the tail end of the round bar is connected with the probe supporting table for a reinforcing conical surface, the probe tail is arranged below the reinforcing conical surface, and the probe tail is an M bolt and is connected to the thread of the tension and pressure sensor through M threads.
Preferably, the hook is provided with a plurality of grooves along the extending direction of the hook.
Preferably, a binding belt is arranged outside the shell and is fixed on the shell through a binding belt mounting hole, so that the measuring instrument is bound with the palm; the finger penetrates into the D-shaped hand guard to support the measuring instrument, so that the measuring instrument is in a horizontal state and is convenient to test.
Preferably, the housing is connected with the outer guide rail through two fixing mounting holes.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. the inner guide rail is matched with the outer guide rail, so that the relative movement of the pressure measuring mechanism and the corn stalks is realized, the friction force is small, the guide is accurate, and the operation is labor-saving;
2. the corn stalk clamping operation mechanism is of a symmetrical structure, can be operated by a right hand and a single hand, can also be operated by a left hand and a right hand, and can be operated by the left hand and the right hand together so as to deal with different stalk strengths, relieve the fatigue of the single-hand operation and improve the working efficiency;
3. the hook is provided with a plurality of length adjusting mounting holes, the mounting position of the hook can be changed, and the extending length of the hook can be adjusted to adapt to stalks with different diameters;
4. only the stems are tightly held by the hooks and the concave platforms, the acupuncture probes are ensured to be in a vertical state with the stems, the probes vertically contact the stems, and the sensors measure the force vertical to the surfaces of the stems;
5. the M6 screw thread at the tail end of the concave table guide shaft not only ensures the direction of the concave table guide shaft, but also can adjust the distance that the concave table guide shaft extends into the concave table, thereby adjusting the depth that the probe penetrates into the stem so as to adapt to crops with different diameters and varieties;
6. the tail part of the needle probe is provided with threads and can be directly installed in a threaded hole of the sensor, a hole is formed in a platform in the middle of the needle probe, a special tool is used for rotating the probe, the probe can be directly replaced outside the instrument, the force for puncturing the skin of the crop stem is limited within the range of the sensor by matching with the probes with different diameters, different end surface areas and different end shapes, the strength for puncturing the skin of the crop stem can be realized, one sensor can measure the strength of different crop skins, the end surface of the concave platform is an arc, the stems with different diameters can be tightly held, the guide shaft and the spring can ensure that the probe does not leak out of the end surface of the concave platform in the non-measuring process, the sensor is not stressed, and the sensor is protected; only the stem is tightly held by the hook and the concave platform, the probe is ensured to be in a vertical state with the stem, the probe is vertically contacted with the stem, the sensor measures the force vertical to the surface of the stem, the thread at the tail end of the guide shaft ensures the direction of the guide shaft, and the distance that the guide shaft extends into the concave platform can be adjusted, so that the depth that the probe penetrates into the stem is adjusted to adapt to crops with different diameters and varieties;
7. the automatic measurement includes: the automatic zero point correction before measurement, save real-time test data, test data can be transmitted through bluetooth module, bluetooth module is opened and is closed by the user, segment code type LCD shows test data and operation menu, touch keyboard, 3 buttons, 1 menu key, two measurement keys, the operation of adaptation left and right hands. The menu key and the function key are matched to realize multiple functions, and the two lithium batteries supply power and automatically switch power supply and charging.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the installation configuration of the clamping mechanism according to the present invention;
FIG. 3 is a schematic structural view of the clamping mechanism of the present invention after disassembly;
FIG. 4 is a schematic view of the pressure measuring mechanism according to the present invention;
FIG. 5 is a schematic view of the control mechanism of the present invention;
FIG. 6 is a schematic view of the structure of a pressure measuring part according to the present invention;
FIG. 7 is a schematic view of a structure of a needle probe according to the present invention;
in the figure: 1. the device comprises a clamping operation mechanism, 101, a hook, 102, an inner guide rail, 103, a D-shaped hand guard, 104, a hand guard mounting frame, 105, an outer guide rail, 106, a length adjusting mounting hole, 107, a groove, 2, a pressure measuring mechanism, 201, a pressure measuring component, 202, a lithium battery pack, 203, a shell, 204, a constraint belt mounting hole, 205, a fixing mounting hole, 2011, a needle probe, 2012, a concave table, 2013, a pull pressure sensor, 2014, a spring, 2015, a concave table guide shaft, 2016, a pull pressure sensor fixing bolt, 20111, a probe head, 20112, a probe neck, 20113, a reinforcing conical surface, 20114, a probe supporting table, 20115, a rotary tool connecting hole, 20116, M6 threads, 3, a control mechanism, 301, a main control circuit board, 302, a liquid crystal display, 303, a Bluetooth circuit board, 304 and a touch keyboard circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the drawings, the present invention provides a technical solution:
the utility model provides a acupuncture formula maize stem stalk lodging intensity rapid survey appearance of convenient operation, rapid survey appearance includes the clamping operation mechanism of direct contact maize stem stalk, the pressure measurement mechanism that is connected with clamping operation mechanism and encapsulates the control mechanism in pressure measurement mechanism, clamping operation mechanism is including setting up at the flat and downward hook of buckling of front end and two D type handguards of rear end, and the two is connected through buckling inner guide and outer guide from top to bottom between the two, and wherein the inner guide is located the top, the tail end of hook is equipped with a plurality of length adjustment mounting holes and through the front end fixed connection of bolt and inner guide, two the D type handguards are set up the rear end of inner guide through "nearly" style of calligraphy handguard mounting bracket, two the symmetry of D type handguards sets up in the both sides of inner guide;
the pressure measuring mechanism comprises a notch-shaped shell, a pressure measuring part packaged at the front part of the shell, a control mechanism packaged at the middle part of the shell and a lithium battery pack arranged at the rear part and used for supplying power to the control mechanism, and the shell is fixedly arranged below the outer guide rail and can move along the inner guide rail along with the clamping operation mechanism;
the pressure measurement component sequentially comprises a needling probe, a concave table with an arc-shaped end face, a drawing pressure sensor, a concave table guide shaft and a spring sleeved on the concave table guide shaft from top to bottom, the drawing pressure sensor is fixed on the control mechanism through a drawing pressure sensor fixing bolt, an opening is formed in the arc face of the concave table, the head of the needling probe extends out of the opening, a notch is formed in the middle of the concave table and sleeved on a shell of the drawing pressure sensor, holes are formed in downward extending parts on two sides of the concave table and are bilaterally symmetrical, the concave table guide shaft penetrates through the spring and then is inserted into the opening, so that the concave table can move along the direction of the drawing pressure sensor, the displacement distance of the concave table relative to the drawing pressure sensor is limited by the depth of the holes, the concave table is prevented from contacting with a stress surface of the drawing pressure sensor, the top end of the shell is provided with an opening, the needling probe in the pressure measurement component extends out of the opening, and when the pressure measurement mechanism is guided to the forefront end along an inner guide rail, the acupuncture probe is contacted with the corn stalks hooked by the hook, and the width of the concave platform exceeds the size of the opening of the shell, so that the concave platform is prevented from extending out of the shell;
furthermore, the control mechanism comprises a main control circuit board, a liquid crystal display, a Bluetooth circuit board and a touch keyboard circuit, the main control circuit board realizes the functions of measurement, conversion, calibration, storage, keyboard response and battery charging management, measurement data and an operation menu are displayed on the liquid crystal display, the measurement data are transmitted through the Bluetooth circuit board, and meanwhile, a user controls the tester through the touch keyboard circuit.
Furthermore, the acupuncture probe comprises a probe head part, a probe neck part, a reinforcing conical surface, a probe supporting table, a rotating tool connecting hole and an M thread, wherein the probe head part is hemispherical and is a stress surface for puncturing corn stalks; the probe neck is a round bar, the tail end of the round bar is connected with the probe supporting table for a reinforcing conical surface, the probe tail is arranged below the reinforcing conical surface, and the probe tail is an M bolt and is connected to the thread of the tension and pressure sensor through M threads.
Furthermore, a plurality of grooves are formed in the hook along the extending direction of the hook.
Furthermore, a binding belt is arranged outside the shell and is fixed on the shell through a binding belt mounting hole, so that the measuring instrument is bound with the palm; the finger penetrates into the D-shaped hand guard to support the tester, so that the tester is in a horizontal state, and the test is convenient.
Further, the shell is connected with the outer guide rail through two fixing and mounting holes.
Furthermore, a plurality of grooves are formed in the hook along the extending direction of the hook.
The working principle is as follows:
a needle-punching corn stalk lodging strength rapid tester is composed of a corn stalk clamping and operating mechanism, a pressure measuring unit and a measuring circuit unit powered by a rechargeable lithium battery. The front end of the corn stalk clamping and operating mechanism is a flat stainless steel hook for clamping corn stalks, and the rear end of the corn stalk clamping and operating mechanism is provided with two D-shaped handguards for convenient operation; the pressure measurement unit is packaged into a T-shaped structure, and a pressure sensor, a digital display and an operation key are embedded in the pressure measurement unit. The pressure measuring unit can move along the guide rail along with the corn stalk clamping and operating mechanism. The right hand holds the D-shaped hand guard, so that the flat stainless steel hook at the front end of the tester clamps the corn stalks, the thumb touches a 'measuring' key, and the tester is in a state to be tested after automatic calibration. The palm exerts force uniformly, the pressure measuring unit runs along the guide rail and the corn stalk clamping mechanism relatively, the stalk outer skin is punctured, the liquid crystal display displays the change of pressure in the moving process, and the maximum value is stably displayed on the display when the measurement is finished. Likewise, the left-hand procedure is the same as the right-hand procedure.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a needle-punching maize stalk lodging intensity rapid determination appearance of convenient operation, its characterized in that, rapid determination appearance includes the centre gripping operating device (1) of direct contact maize stalk, the ressure measurement mechanism (2) that are connected with centre gripping operating device (1) and encapsulates control mechanism (3) in ressure measurement mechanism (2), centre gripping operating device (1) is including setting up at the flat and downwardly bent hook (101) of front end and two D type armguards (103) of rear end, is connected through buckling inner rail (102) and outer guide rail (105) from top to bottom between the two, and wherein inner rail (102) are located the top, the tail end of hook (101) is equipped with a plurality of length adjustment mounting holes (106) and through the front end fixed connection of bolt and inner rail (102), two D type armguard (103) set up the rear end of inner rail (102) through "nearly" style of calligraphy mounting bracket (104), the two D-shaped handguards (103) are symmetrically arranged on two sides of the inner guide rail (102);
the pressure measurement mechanism (2) comprises an 'line-folding' shaped shell (203), a pressure measurement component (201) packaged at the front part of the shell (203), a control mechanism (3) packaged at the middle part of the shell (203) and a lithium battery pack (202) arranged at the rear part and used for supplying power to the control mechanism (3), wherein the shell (203) is fixedly arranged below the outer guide rail (105) and can move along with the inner guide rail (102) along with the clamping operation mechanism (1);
the pressure measurement part (201) sequentially comprises a needling probe (2011) and a concave table (2012) with an arc-shaped end face from top to bottom, the concave table (2012) is pulled to a pressure sensor (2013), a concave table guide shaft (2015) and a spring (2014) sleeved on the concave table guide shaft (2015), the pressure sensor (2013) is fixed on a control mechanism (3) through a pressure sensor fixing bolt (2016), an opening is formed in the arc-shaped surface of the concave table (2012), the head of the needling probe (2011) extends out of the opening, a notch is formed in the middle of the concave table (2012), the pressure sensor (2013) is sleeved with the concave table (2012), holes are formed in the middle of downward extending parts on two sides of the concave table (2012), the holes are symmetrical, the concave table guide shaft (2015) penetrates through the spring (2014) and then is inserted into the hole, the concave table (2012) can move along the direction of pulling the pressure sensor (2013), and the hole depth limits the displacement distance of the concave table (2012) relative to the pressure sensor (2013), the concave platform (2012) is prevented from contacting the stress surface of the pull pressure sensor (2013), the top end of the shell (203) is provided with an opening, the acupuncture probe (2011) in the pressure measurement component (201) extends out of the opening, when the pressure measurement mechanism (2) is guided to the forefront end along the inner guide rail (102), the acupuncture probe (2011) is contacted with the corn stalk hooked by the hook (101), the width of the concave platform (2012) exceeds the size of the opening of the shell (203), and the concave platform (2012) is prevented from extending out of the shell (203);
the control mechanism (3) comprises a main control circuit board (301), a liquid crystal display (302), a Bluetooth circuit board (303) and a touch keyboard circuit (304), the main control circuit board (301) realizes the functions of measurement, conversion, calibration, storage, keyboard response and battery charging management, measurement data and an operation menu are displayed on the liquid crystal display (302), the measurement data are transmitted through the Bluetooth circuit board (303), and meanwhile, a user controls the tester through the touch keyboard circuit (304);
the acupuncture probe (2011) comprises a probe head (20111), a probe neck (20112), a reinforcing conical surface (20113), a probe supporting platform (20114), a rotating tool connecting hole (20115) and an M6 thread (20116), wherein the probe head (20111) is hemispherical and is a stress surface for puncturing a corn stalk; the probe neck (20112) is a round bar, the tail end of the round bar is connected with the probe supporting table (20114) through a reinforcing conical surface (20113), the probe tail is arranged below the reinforcing conical surface (20113), the probe tail is an M6 bolt, and the probe neck is connected to a thread of the pull pressure sensor (2013) through an M6 thread (20116).
2. The rapid corn stalk lodging strength tester capable of being operated conveniently and quickly as claimed in claim 1, wherein the hook (101) is provided with a plurality of grooves (107) along the extending direction thereof.
3. The portable acupuncture type corn stalk lodging strength rapid tester of claim 1, wherein the housing (203) is externally provided with a binding belt, the binding belt is fixed on the housing (203) through a binding belt mounting hole (204), and the tester is bound with the palm; the finger penetrates into the D-shaped hand guard (103) to support the measuring instrument, so that the measuring instrument is in a horizontal state and is convenient to test.
4. The quick tester for lodging strength of corn stalks by needle punching for convenient operation as claimed in claim 1, wherein said housing (203) is connected with the outer guide rail (105) through two fixing and mounting holes (205).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010213802.6A CN111238960B (en) | 2020-03-24 | 2020-03-24 | Acupuncture type corn stalk lodging strength rapid measuring instrument convenient to operate |
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| CN202010213802.6A CN111238960B (en) | 2020-03-24 | 2020-03-24 | Acupuncture type corn stalk lodging strength rapid measuring instrument convenient to operate |
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| CN111238960A CN111238960A (en) | 2020-06-05 |
| CN111238960B true CN111238960B (en) | 2022-09-20 |
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| CN113720840B (en) * | 2021-08-12 | 2024-02-09 | 定西市农业科学研究院 | Oat variety stalk lodging-resistant measuring device and application method thereof |
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| CN108037013A (en) * | 2017-12-29 | 2018-05-15 | 中国农业大学 | A kind of portable crop straw stiffness measuring device and method |
| CN207816734U (en) * | 2018-01-19 | 2018-09-04 | 内蒙古农业大学 | A kind of novel sugar grass bending strength analyzer |
| CN207764058U (en) * | 2018-01-29 | 2018-08-24 | 山西省农业科学院小麦研究所 | A kind of corn stem force tester resistant to lodging |
| CN207937283U (en) * | 2018-04-10 | 2018-10-02 | 青岛农业大学 | Corn stem pierces through in situ and bending force measuring device |
| CN209416681U (en) * | 2019-01-24 | 2019-09-20 | 广东省特种设备检测研究院珠海检测院 | A kind of wirerope group uniform tension in order system safety testing device |
| CN110208078A (en) * | 2019-07-17 | 2019-09-06 | 河南科技学院 | A kind of crop penetrometer resistance measurement probe and crop penetrometer resistance measurement device |
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