CN109269372A - A kind of body bearing training ruler - Google Patents
A kind of body bearing training ruler Download PDFInfo
- Publication number
- CN109269372A CN109269372A CN201811198118.4A CN201811198118A CN109269372A CN 109269372 A CN109269372 A CN 109269372A CN 201811198118 A CN201811198118 A CN 201811198118A CN 109269372 A CN109269372 A CN 109269372A
- Authority
- CN
- China
- Prior art keywords
- ruler
- measurement column
- measurement
- pendulum
- body bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
- G01B3/04—Rulers with scales or marks for direct reading rigid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
- G01B3/04—Rulers with scales or marks for direct reading rigid
- G01B3/08—Rulers with scales or marks for direct reading rigid extensible
Abstract
The present invention relates to teaching and training measuring device fields, disclose a kind of body bearing training ruler, including putting ruler, it further include measurement column, the pendulum ruler is scalable, and one end rotation for putting ruler is set on measurement column, the one end of ruler far from measurement column is put equipped with the fixing piece for fixing people's foot, the outside for putting ruler is equipped with graduated arc, and the center of circle of graduated arc is located at the connecting portion of pendulum ruler and measurement column, and measurement column lower part, which is also slided, is equipped with height-adjustable sliding shoe.The problem of mobile or swing is easily occurred during measurement using the body that the present invention is able to solve existing measuring scale and trainee, and causes inaccurate measurement, cumbersome and low efficiency.
Description
Technical field
The present invention relates to teaching and training measuring device fields, and in particular to a kind of body bearing training ruler.
Background technique
During shape up exercise, in order to practice the pliability of body, it is often necessary to carry out the movement such as ligament tension, split
Practice need to guarantee the movement of trainee in place and in order to reach preferable practice effect, thus the process stretched in split
In, it needs to measure the angle between both legs, be monitored with the practice degree to trainee.
Currently, the side of enantiomorph is measured, mainly carried out by artificial, after trainee sets movement, by gauger's hand
Hold the training measurement that angle measuring scale carries out angle between both feet.Hand measuring angle, one side measuring scale are not fixed, and are easy to lead
Measuring scale is caused to occur mobile during measurement and cause measurement error, on the other hand since trainee's body is without support, easily
The case where being waved during measurement, and then measurement easily caused to malfunction, thus generally require to be averaged after repeatedly measuring
Value come estimated it is being measured as a result, in this way, measurement work it is relatively complicated, when trainee is more, measurement efficiency also compared with
It is low.
Summary of the invention
The invention is intended to provide a kind of body bearing training ruler, surveyed with solving the body of existing measuring scale and trainee
The problem of easily occurring mobile during amount or swing, and causing inaccurate measurement, cumbersome and low efficiency.
In order to achieve the above objectives, the present invention adopts the following technical scheme: a kind of body bearing trains ruler, including pendulum ruler, also
Including measurement column, the pendulum ruler is scalable, and one end rotation for putting ruler is set on measurement column, and pendulum ruler is set far from one end of measurement column
There is the fixing piece for fixing people's foot, the outside for putting ruler is equipped with graduated arc, and the center of circle of graduated arc is located at pendulum ruler and surveys
At the connecting portion for measuring column, measurement column lower part, which is also slided, is equipped with height-adjustable sliding shoe.
The principle of this programme is: when practical application, the leg that pendulum ruler is used to that trainee to be followed to swing stretching, extension moves together, so that
The movement for putting ruler is synchronous with the leg exercise of trainee, improves the accuracy of measurement work.Measurement column is to connect pendulum ruler, simultaneously
As the support of trainee's body, avoid trainee during measurement body-sway motion and lead to asking for larger measurement error
Topic improves the validity of measurement work.Foot of the fixing piece to fixed trainee, so that trainee is while stretching leg,
Interaction relation can be kept with pendulum ruler, and then guarantees the accuracy of measurement work.When trainee stretches split, a foot is stood vertically
Vertical, another foot fixture is fixed on pendulum ruler, and when stretching split, pendulum ruler is swung on graduated arc and correspondence is different
Scale is achieved in the measurement to different stretching angles, by position of the observation pendulum ruler on graduated arc, can correspond to reading
The angle stretched out.
The invention has the advantages that
1, pendulum ruler due to being connected on measurement column, without manpower holding measure uses, avoid pendulum ruler movement and
The problem of causing measurement error；
2, the control moved using the foot of the measured to pendulum ruler enables pendulum ruler to follow the foot of the measured same
Step moves and carries out to stretch amplitude the measurement of corresponding angle, reduces the error of measurement；
3, in stretching, extension, body rests on measurement column the measured, and body is thus avoided to occur during measurement
It shakes, the validity of enhancing measurement work avoids the troublesome operation repeatedly measured, improves the working efficiency of measurement work；
4, measurement column is used as the body-support component of the measured simultaneously, can be avoided that the measured body is curved to ask
Topic improves the validity of detection work；
5, pendulum ruler uses telescopic structure, cooperates sliding shoe, so that device is used suitable for people of different heights, enhancing
The practical function of device.
Preferably, as an improvement, rotation is equipped with lead screw on measurement column, and the sliding sleeve of cooperation, sliding sleeve are arranged on lead screw
On be installed with height measuring rule, and telescopic support rod is fixedly connected between sliding sleeve and measurement column.When external impetus such as electricity
When machine drives lead screw to rotate, slides over and slided on lead screw and enable height measuring rule mobile and the height of the measured is surveyed
Amount, is monitored the height of the measured, and to avoid the measured while stretching leg, knockdown occurs for body
Situation guarantees the accuracy and validity of measurement work, supervises conducive to the practice of the measured.Support rod props up sliding sleeve
Support, avoids sliding sleeve that lead screw is followed to rotate.
Preferably, it as an improvement, puts and is equipped with air bag between ruler and measurement column, air bag is connected with inflation mechanism, measures
Cavity is equipped with inside column, inflation mechanism includes the impeller in cavity, and impeller is fixedly connected on lead screw, on the side wall of cavity
Equipped with air inlet and air outlet, gas tube is connected between air outlet and air bag.When lead screw rotation, drives impeller rotation and enable
Air in cavity is expelled in air bag by air outlet, after air bag air inlet expansion and between two legs of the measured to pendulum ruler and
The leg lifted is supported, and the resistance from pendulum ruler being subject to when on the one hand reducing the measured lift leg is conducive to the measured leg
The lifting in portion, the problem of on the other hand can be avoided aching and limp fall in the measured leg and impacted to measurement effect.Air inlet
Mouth keeps the constant flow of air-flow, and then guarantee the inflation effect of air bag for entering the wind into cavity.
Preferably, as an improvement, be equipped with partition in cavity, lead screw and air inlet are located at the side of partition, impeller with
Air outlet is located at the other side of partition, and partition is equipped with multiple ventilation holes.Partition separates air inlet and air outlet in two sides,
So as to slow down the speed that air-flow is discharged by air bag, and then slow down the speed that air bag restores deformation, to protect in measurement process
Air bag is demonstrate,proved to the support effect of the measured, conducive to the progress of measurement work.
Preferably, as an improvement, retracting cylinder is additionally provided on measurement column, retracting cylinder includes being fixedly arranged on consolidating on measurement column
Determine the slip ring of ring and sliding on measurement column, telescopic shaft is connected between slip ring and fixed ring.Retracting cylinder is for covering
On the knee of the measured, the leg of the measured is supported, the measured is avoided to occur knee during stretching
The case where bending and influence measurement result.
Preferably, as an improvement, the inside of telescopic shaft is equipped with cavity, is equipped with the open at one end and other end in cavity
Closed elastic tube, one end that elastic tube is equipped with opening are connected to air outlet.When initial, retracting cylinder is in contraction-like, and is convenient for quilt
Gauger foot wears, and when air outlet is dried to elastic tube, air-flow extends elastic tube swelling, and then passes through elastic tube band
Dynamic flexible elongate axis, is placed in knee site automatically with promoting retracting cylinder to stretch, is achieved in retracting cylinder in the measured knee
The automatic suit of cover position uses convenient for practical operation.
Preferably, as an improvement, the inner wall of retracting cylinder is equipped with rubber pad.Rubber pad has biggish flexibility, energy
Comfort level when enough enhancing the measured knee and retracting cylinder contact enhances practical function.
Preferably, as an improvement, fixing piece includes toe board, is hinged with buckle on toe board, and buckle is equipped with the
One buckle, toe board are equipped with the second buckle being clasped with first.Toe board is used to place the foot of the measured, and buckle is used
In being fixed on foot on pendulum ruler, foot is avoided to separate with pendulum ruler dislocation, to guarantee the effect of measurement.
Detailed description of the invention
Fig. 1 is the axial partial sectional view of the embodiment of the present invention.
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Fig. 3 is the top view of fixing piece in Fig. 1.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: measurement column 1, pendulum ruler 2, graduated arc 3, lead screw 4, sliding shoe 5, plate
Body 6, ventilation hole 7, sliding sleeve 8, height measuring rule 9, support rod 10, air bag 11, gas tube 12, retracting cylinder 13, fixed ring 14, sliding
Ring 15, telescopic shaft 16, fixing piece 17, toe board 18, buckle 19, cavity 20, impeller 21, air inlet 22, air outlet 23, partition
24。
Embodiment is as shown in Fig. 1: a kind of body bearing training ruler, including measurement column 1,1 bottom of measurement column are welded with plate
Body 6, the inside of measurement column 1 are equipped with cavity 20, lateral partition 24 are equipped in cavity 20, and partition 24 is equipped with multiple ventilation holes
7, cavity 20 is divided into upper cavity and lower chamber by partition 24, and the cavity wall of upper cavity is equipped with air inlet 22, the cavity wall of lower chamber
It is equipped with air outlet 23.1 lower part of measurement column is additionally provided with retracting cylinder 13, and as shown in connection with fig. 2, retracting cylinder 13 includes fixed by bolt
Tool in the slip ring 15 of fixed ring 14 and sliding on measurement column 1 on measurement column 1, between slip ring 15 and measurement column 1
Body slip connection mode are as follows: vertical sliding rail is equipped on measurement column 1, slip ring 15 is equipped with card ball, and card ball is arranged in sliding rail
It is interior and can be moved along sliding rail.Telescopic shaft 16 is welded between slip ring 15 and fixed ring 14, the inside of telescopic shaft 16 is equipped with cavity,
The closed elastic tube of the open at one end and other end is equipped in cavity, one end that elastic tube is equipped with opening is connected to air outlet 23,
The closed one end of elastic tube is against on slip ring 15.The inner wall of retracting cylinder 13 is equipped with rubber pad.It is also sliding on the sliding rail of measurement column 1
It is dynamic to be equipped with height-adjustable sliding shoe 5.
1 upper end of measurement column is equipped with lead screw 4 by bearing rotation, and one end of lead screw 4 passes through upper cavity and partition 24.Lead screw 4
On be arranged with the sliding sleeve 8 of cooperation, height measuring rule 9, and bolt between sliding sleeve 8 and measurement column 1 are installed with by bolt on sliding sleeve 8
It is fixedly connected with telescopic support rod 10.Lead screw 4 is connected with motor.
1 lower rotational of measurement column is equipped with the pendulum ruler 2 that can be rotated in perpendicular, and pendulum ruler 2 is shrinkage-rule comprising sliding
The first ruler and the second ruler of connection, the scalable cunning of slip connection mode and existing telescopic rod between the first ruler and the second ruler
Dynamic connection type is identical, and this will not be repeated here, and one end rotation for putting ruler is set on measurement column 1.The outside for putting ruler 2 is equipped with curved scale
Plate 3, the center of circle of graduated arc 3 are fixed at the connecting portion of pendulum ruler 2 and measurement column 1.As shown in connection with fig. 3, pendulum ruler 2 is far from survey
One end of column 1 is measured equipped with the fixing piece 17 for fixing people's foot, fixing piece 17 includes toe board 18, is hinged with and buckles on toe board 18
Plate 19, buckle 19 are equipped with the first buckle, and toe board 18 is equipped with second to be clasped with first and buckles, in the present embodiment
The buckle structure of the structure such as car belt of first buckle and the second buckle, belongs to the prior art, this will not be repeated here, and this reality
The first buckle and the second buckle applied in example are magnetic clasp, are closely fastened between the first buckle and the second buckle by magnetic force.Pendulum
Air bag 11 is equipped between ruler 2 and measurement column 1, air bag 11 is connected with inflation mechanism.Inflation mechanism includes being located at the intracorporal fan of cavity of resorption
Wheel 21, the key connection of impeller 21 are fixed on lead screw 4, and gas tube 12 is connected between air outlet 23 and air bag 11.
Specific implementation process is as follows:
When needing to measure stretching angle in body practice, the length of adjusting pendulum ruler and the height of vertical adjustment sliding shoe 5, one
Aspect flushes the bottom end for putting ruler 2 with sliding shoe 5, and it is long suitable on the other hand to make the leg of the length for putting ruler 2 and the measured, and enables
The upper end of pendulum ruler 2 is located at the leg root position of the measured.Then sliding shoe 5 is blocked, keeps sliding shoe 5 fixed, and ruler 2 will be put
Length is fixed.The measured is stood on the plate body 6 of 1 lower part of measurement column connection, and body is towards measurement column 1 and rests on measurement column
On 1, a foot passes through retracting cylinder 13 and steps on sliding shoe 5, and another foot is placed on toe board 18, rotates buckleing on toe board 18
Plate 19 fastens the first buckle and the second buckle, and magneticaction reinforces the coupling force between two buckles, avoids being measured
The foot of person falls off from toe board 18.Then the measured starts lift on the foot that stretching, extension split behind will be fixed with pendulum ruler 2,
Pendulum ruler 2 starts the foot for following the measured to stretch swing at this time, and pendulum ruler 2 moves and corresponding different scale in arc measurement plate
Line may know that whether the extension degree of the measured is up to standard, judge that the movement of the measured is with this by observing graduation mark
No standard.
Meanwhile starting motor, motor drives lead screw 4 to rotate, so that sliding sleeve 8 is under the position-limiting action of support rod 10 along lead screw
4 glide, and after the height measuring rule 9 on sliding sleeve 8 is moved to the crown of the measured, motor are closed, at this point, height measuring rule 9 is right
The height of the measured measures, the height and the actual height of detected person gone out by measurement of comparison may know that tested
Whether amount person has the case where body bending during measurement, to help the measured to correct in time.
Impeller 21 is driven to rotate while lead screw 4 rotates, external air-flow enters in upper cavity via air inlet 22, and wears
The ventilation hole 7 crossed on partition 24 enters in lower chamber, is then entered in air bag 11 and elastic tube by air outlet 23.Air bag 11 fills
It is expanded after gas and pendulum ruler 2 is supported, on the one hand reduce the downward pulling force effect from pendulum ruler 2 that the leg of lifting is subject to,
It avoids leg from bearing biggish power and acutely aching and limp situation occurs, another aspect air bag 11 is expanded and propped up between two legs
Support, mitigates the aching and limp feeling of leg, so that detected person remain stationary state and is convenient for measuring the progress of work.
Expansion is extended and will be pushed up on slip ring 15 after elastic tube inflation, and retracting cylinder 13 is thus promoted to extend, and retracting cylinder 13 is certainly
It is dynamic to be placed on the knee of the measured leg standing on the ground and knee site is supported, avoid the knee of detected person
The result of bending and influence measurement.
After completing measurement, it is again started up motor, motor drives lead screw 4 to reversely rotate, and impeller 21 follows lead screw 4 to invert at this time
And air-flow can not be pushed into lower chamber, the air-flow in air bag 11 and elastic tube is acted in the elastic potential energy of air bag 11 or elastic tube
Under be expelled in lower chamber, and measurement column 1 is discharged by ventilation hole 7 and air inlet 22, in the process due to the blocking of partition 24, cavity of resorption
Body is slower to upper cavity exhaust, to slow down the exhaust velocity of air bag 11 and elastic tube, so that the leg of lifting is in air bag
It is slowly put down under 11 supporting role, avoids the problem that quick-footed speed falls and causes joint injury, simultaneous retractable cylinder 13 will
Knee site slow release avoids knee injury conducive to the slow recovery of knee bends degree, enhances practical function.Retracting cylinder 13
In rubber pad can enhance the comfort level of the measured knee site, convenient for actual use.
What has been described above is only an embodiment of the present invention, the common sense such as well known specific technical solution and/or characteristic in scheme
It does not describe excessively herein.It should be pointed out that for those skilled in the art, before not departing from technical solution of the present invention
It puts, several modifications and improvements can also be made, these also should be considered as protection scope of the present invention, these all will not influence this
Invent the effect and patent practicability implemented.The scope of protection required by this application should be based on the content of the claims,
The records such as the specific embodiment in specification can be used for explaining the content of claim.
Claims (8)
1. a kind of body bearing training ruler, including pendulum ruler, it is characterised in that: further include measurement column, the pendulum ruler is scalable, and puts
One end rotation of ruler is set on measurement column, and pendulum ruler is equipped with the fixing piece for fixing people's foot far from one end of measurement column, puts ruler
Outside is equipped with graduated arc, and the center of circle of graduated arc is located at the connecting portion of pendulum ruler and measurement column, and measurement column lower part is also
Sliding is equipped with height-adjustable sliding shoe.
2. a kind of body bearing training ruler according to claim 1, it is characterised in that: rotation is equipped with silk on the measurement column
Thick stick is arranged with the sliding sleeve of cooperation on lead screw, is installed with height measuring rule on sliding sleeve, and be fixedly connected between sliding sleeve and measurement column
Telescopic support rod.
3. a kind of body bearing training ruler according to claim 2, it is characterised in that: set between pendulum ruler and the measurement column
There is air bag, air bag is connected with inflation mechanism, and cavity is equipped with inside the measurement column, and inflation mechanism includes the fan in cavity
Wheel, impeller are fixedly connected on lead screw, and the side wall of cavity is equipped with air inlet and air outlet, are connected between air outlet and air bag
Gas tube.
4. a kind of body bearing training ruler according to claim 3, it is characterised in that: be equipped with partition, silk in the cavity
Thick stick and air inlet are located at the side of partition, and impeller and air outlet are located at the other side of partition, and partition is equipped with multiple ventilation holes.
5. a kind of body bearing training ruler according to claim 4, it is characterised in that: be additionally provided on the measurement column flexible
Cylinder, retracting cylinder include the slip ring of the fixed ring being fixedly arranged on measurement column and sliding on measurement column, slip ring and fixed ring
Between be connected with telescopic shaft.
6. a kind of body bearing training ruler according to claim 5, it is characterised in that: the inside of the telescopic shaft is equipped with chamber
Body, is equipped with the closed elastic tube of the open at one end and other end in cavity, elastic tube be equipped with opening one end and the air outlet
Connection.
7. a kind of body bearing training ruler according to claim 5 or 6, it is characterised in that: on the inner wall of the retracting cylinder
Equipped with rubber pad.
8. a kind of body bearing training ruler according to claim 1, it is characterised in that: the fixing piece includes toe board,
Buckle is hinged on toe board, buckle is equipped with the first buckle, and toe board is equipped with the second buckle being clasped with first.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198118.4A CN109269372B (en) | 2018-10-15 | 2018-10-15 | Physique appearance training chi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198118.4A CN109269372B (en) | 2018-10-15 | 2018-10-15 | Physique appearance training chi |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109269372A true CN109269372A (en) | 2019-01-25 |
| CN109269372B CN109269372B (en) | 2020-05-15 |
Family
ID=65196829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811198118.4A Active CN109269372B (en) | 2018-10-15 | 2018-10-15 | Physique appearance training chi |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109269372B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5558607A (en) * | 1995-09-12 | 1996-09-24 | Darling; Thomas G. | Training device for martial art athletes |
| US5713135A (en) * | 1995-10-31 | 1998-02-03 | Acopulos; Brad M. | Multi-purpose carpentry measuring device |
| US20020094919A1 (en) * | 2000-07-26 | 2002-07-18 | Rennex Brain G. | Energy-efficient running aid |
| CN201603040U (en) * | 2009-12-29 | 2010-10-13 | 北京斯睿美医疗科技有限公司 | Novel body position fixing device |
| CN102512307A (en) * | 2011-12-23 | 2012-06-27 | 清华大学 | Multi-position lower limb rehabilitation training robot |
| US20140194266A1 (en) * | 2013-01-10 | 2014-07-10 | The Board Of Regents Of The University Of Texas System | Stretching Machine |
| CN204891100U (en) * | 2015-08-31 | 2015-12-23 | 哈尔滨理工大学 | Novel multi -purpose exercise of aerobics exercises device |
| KR101623496B1 (en) * | 2015-08-13 | 2016-05-23 | 허정욱 | legs exercising and backbone correcting apparatus |
| CN206183883U (en) * | 2016-11-22 | 2017-05-24 | 冉世宇 | Many function body behaviour training ware |
| CN206414718U (en) * | 2017-02-08 | 2017-08-18 | 西安医学院 | A kind of multi-purpose exercise apparatus of Novel body building behaviour |
| CN107469286A (en) * | 2017-09-22 | 2017-12-15 | 山东禹王生态食业有限公司 | A kind of leg press |
| CN107890635A (en) * | 2017-12-18 | 2018-04-10 | 刘建 | Dance work(skill, which is seethed, copies guarantor's training aids |
-
2018
- 2018-10-15 CN CN201811198118.4A patent/CN109269372B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5558607A (en) * | 1995-09-12 | 1996-09-24 | Darling; Thomas G. | Training device for martial art athletes |
| US5713135A (en) * | 1995-10-31 | 1998-02-03 | Acopulos; Brad M. | Multi-purpose carpentry measuring device |
| US20020094919A1 (en) * | 2000-07-26 | 2002-07-18 | Rennex Brain G. | Energy-efficient running aid |
| CN201603040U (en) * | 2009-12-29 | 2010-10-13 | 北京斯睿美医疗科技有限公司 | Novel body position fixing device |
| CN102512307A (en) * | 2011-12-23 | 2012-06-27 | 清华大学 | Multi-position lower limb rehabilitation training robot |
| US20140194266A1 (en) * | 2013-01-10 | 2014-07-10 | The Board Of Regents Of The University Of Texas System | Stretching Machine |
| KR101623496B1 (en) * | 2015-08-13 | 2016-05-23 | 허정욱 | legs exercising and backbone correcting apparatus |
| CN204891100U (en) * | 2015-08-31 | 2015-12-23 | 哈尔滨理工大学 | Novel multi -purpose exercise of aerobics exercises device |
| CN206183883U (en) * | 2016-11-22 | 2017-05-24 | 冉世宇 | Many function body behaviour training ware |
| CN206414718U (en) * | 2017-02-08 | 2017-08-18 | 西安医学院 | A kind of multi-purpose exercise apparatus of Novel body building behaviour |
| CN107469286A (en) * | 2017-09-22 | 2017-12-15 | 山东禹王生态食业有限公司 | A kind of leg press |
| CN107890635A (en) * | 2017-12-18 | 2018-04-10 | 刘建 | Dance work(skill, which is seethed, copies guarantor's training aids |
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| Publication number | Publication date |
|---|---|
| CN109269372B (en) | 2020-05-15 |
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