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48 results about "Face muscles" patented technology

Method for automatically constructing three-dimensional face muscle model

The invention provides a method for automatically constructing a three-dimensional face muscle model. The muscle model is the most commonly used facial animation drive model at present, three-dimensional facial expression changes are driven by simulating contraction of the facial muscle; however, an artist spends much time in performing fine adjusting on the construction of the conventional face muscle model, and after the face muscle model is changed at a time, all the construction even needs to do again. Based on the problems, the invention provides the novel method for constructing the face muscle model; the method realizes the automatic construction and the assembly of the face muscle by researching a space position mapping relationship between the three-dimensional face characteristic points and the face muscle; and an experimental result proves that the method makes the artist be free from fussy hand debugging, and enables a normal user to customize a three-dimensional image with various expressions required per se.
Owner:BEIHANG UNIV

Tracking method of human body motions and identification method thereof

A tracking method of human body motions and an identification method thereof are disclosed. The tracking method includes the following steps: providing a continuous and multi-frame dynamic image and establish a background based on the dynamic image; simultaneously performing a pretreatment and a human body position process on every frame of the image so as to acquire and output human body position information of the frame. The identification method includes the following steps: arranging a human body identification mode, such as a mouse mapping mode, a state mode, a motion mode and the like; identifying the human body position information of the every frame based on the human body identification mode and outputting the identification information. By using the methods of the invention, a video can be tracked continuously, high-accurately and real-timely for the every frame and the human body position information can be output. Especially, the methods can be used to tracking the motions of small face sport organs, such as eyes, a mouth and face muscles and motions of an upper limb part with a large motion amplitude, a high frequency and complex motion characteristics. Simultaneously, attitude information, such as a mouse position, a mouse movement, single click, double click, hands position, a left hand movement from left to right and the like, can be identified and output.
Owner:SHANGHAI MOBINEX SOFTWARE TECH

Face muscle relaxing device used for face massage

The invention discloses a face muscle relaxing device used for face massage. The device comprises a surface shell, a heating strip, a PCB, a vibrating motor, a battery and a bottom shell. The surface shell and the bottom shell are matched and assembled into a casing, and an instillation cavity used for installing the heating strip, the PCB, the vibrating motor and the battery is formed in the casing. The heating strip, the vibrating motor and the battery are electrically connected with the PCB. A control button is arranged on the PCB. The face muscle relaxing device used for face massage further comprise a key used for driving the control button, the bottom shell is provided with a key installation hole used for an upper protrusion of the key to penetrate, and the upper protrusion of the key penetrates through the key installation hole and protrudes out of the surface of the bottom shell. The face muscle relaxing device used for face massage is in a plate shape, is large in massage area, is internally provided with the vibrating motor and the heating strip, the heating strip generates heat in the vibrating massage process of the vibrating motor, accordingly the aims of soothing the channels and quickening the network vessels and conducting scraping therapy are achieved while large-area massage is conducted on the face, and practicality is high.
Owner:王海涛

Device and method used for monitoring mouth and face muscle training

The invention provides a device used for monitoring mouth and face muscle training. The device comprises a device body and a sensor. According to the structure of the device body, the device body canbe worn on the mouth and face part, the sensor is arranged on the device body, and in this way, when the device body is worn on the mouth and face part, the sensor can sense preset-mode movement of mouth and face muscles to be trained.
Owner:WUXI EA MEDICAL INSTR TECH

Method for tracking human body motions and system thereof

A method for tracking human body motions and a system thereof are disclosed. The method includes the following steps: providing a continuous and multi-frame dynamic image, wherein the dynamic image comprise a background image segment and a work image segment possessing dynamic people as a foreground and the background; inputting every frame of the background image segment and performing a background process so as to establish the background; performing an image pretreatment on the every frame of the work image segment; performing a human body position process on the every frame of the work image segment so as to acquire and output human body position information of the frame. By using the method and the system of the invention, a video can be tracked continuously, high-accurately and real-timely for the every frame and the human body position information can be output. Especially, the method and the system can be used to tracking the motions of small face sport organs, such as eyes, a mouth and face muscles and motions of an upper limb part with a large motion amplitude, high frequency and complex motion characteristics.
Owner:SHANGHAI MOBINEX SOFTWARE TECH

Chewing gum with health-care function

The invention relates to a chewing gum and in particular relates to a chewing gum with a health-care function. The chewing gun is prepared from the following materials in percentage by weight: 20%-50% of chewing gum base materials, 10%-40% of medlar extract, 0-10% of liquorice extract, 0-1% of mint extract, 20%-35% of a sweetening agent and 2%-4% of a softening agent. The technical scheme of the invention is as follows: based on the existing chewing gum, the medlar extract which is Ningxia local product is used as the main additive of the chewing gun, and is supplemented with the liquorice extract, the sweetening agent and the mint extract to prepare the functional chewing gun. During a chewing process of the chewing gum, the medlar extract can enter the body, so that the chewing gum can be used for adjusting the body immunity, delaying the ageing, tonifying kidney and nourishing the liver, moistening lung and improving eyesight while keeping the breath fresh, exercising the face muscles and enabling the gingival to be more stable, and also can be used for improving including eyestrain and dryness, and preventing the problems including diminution of vision, blurred vision, crystal yellow spot and the like.
Owner:广煜医药科技(宁夏)有限公司

Virtual character photographic system and virtual character photographic method

The invention provides a virtual character photographic system. The virtual character photographic system comprises a three dimensional (3D) virtual human model, an acquisition terminal, an expression analysis module, an expression recurrence module and a display module, wherein the acquisition terminal is used for acquiring digital images of a character, the expression analysis module is used for resolving expressions of the character in the digital image into a plurality of expression records which are composed of a position of each of five sense organs or positions of face muscles, the expression recurrence module is used for recurring an expression of the character on the 3D virtual human model according to the expression records, and the display module is used for displaying the 3D virtual human model. The virtual character photographic system and a virtual character photographic method acquire motions and expressions of the character through devices such as a camera, directly convert the motions and the expressions to motions and expressions of the 3D virtual human model, and form a 3D virtual human photograph. The virtual character photographic system and the virtual character photographic method have the advantages of being simple in operation, high in efficiency, wide in market prospect, and the like.
Owner:苏州跨界软件科技有限公司

Marketing analysis method and system based on eye expressions and facial expressions

InactiveCN104504599AReal-time commandFinanceMarketingEyewearPupil
Disclosed is a marketing analysis method and system based on eye expressions and facial expressions. The system comprises a banking business server, wearable glasses, a pupil change analyzing device, body tension sensors and a body characteristic parameter storing and analyzing device. The banking business server is used for analyzing the facial expressions as well as pupil changes to guide the actions of a customer manager in real time; the wearable glasses are used for carrying the pupil change analyzing device and a body tension sensor set, receiving information from the banking business server and communicating with the banking business server to upload the eye expression and facial expression parameters of a customer to the banking business server; the pupil change analyzing device is used for recording the pupil changes of a user; the body tension sensors are a group of fiber grating sensors, which are hung under a glass frame and adhered to cheekbones through self-adhesive silicon rubber for detecting facial muscle changes and extracting facial expression characteristic parameters; the body characteristic parameter storing and analyzing device is used for storing the tension characteristics and the pupil characteristics of various expressions of the bank customer manager.
Owner:王美金

Face motion synthesis method based on voice driving, electronic equipment and storage medium

The embodiment of the invention relates to the technical field of computer information, and discloses a face motion synthesis method based on voice driving, electronic equipment and a storage medium. The method comprises the following steps: processing a voice signal of a to-be-recognized face motion to obtain an audio vector corresponding to the voice signal; inputting the audio vector into a parameter recognition model for processing, and outputting a face muscle motion parameter corresponding to the to-be-recognized face motion; and moving angular points on a plurality of elastomers divided according to face muscle distribution in a face model through the face muscle motion parameters of the to-be-recognized face motion, and obtaining a to-be-recognized face motion result. The scheme can be universally applied to a character model containing a plurality of angular point numbers, and the output human face motions are rich and the expression effect is natural.
Owner:CLOUDMINDS BEIJING TECH CO LTD

Method and apparatus for face symmetry recognition, storage medium, and terminal equipment

The invention provides a method and apparatus for face symmetry recognition, a storage medium, and terminal equipment. The method includes: obtaining a to-be-recognized face image; generating a surface texture image and a muscle texture image according to the obtained face image; determining a face contour symmetry condition of the face image according to the surface texture image; determining a face muscle symmetry condition of the face image according to the muscle texture image; and generating a suggestion for adjusting the face symmetry according to the face contour symmetry condition andthe face muscle symmetry condition. By employing the method and apparatus for face symmetry recognition, the storage medium, and the terminal equipment, the condition of face symmetry can be recognized.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD

Facial paralysis detection system based on artificial intelligence and muscle model

The invention relates to the technical field of computer vision, in particular to a facial paralysis detection system based on artificial intelligence and a muscle model, which comprises a face region division module, a symmetrical region detection module, a unilateral region association module and a facial paralysis detection module which are connected in sequence; the invention solves the problems that the existing facial paralysis detection technology ignores the motion relevance between adjacent areas on one side, and the face area cannot be accurately divided, so that a certain error exists in facial paralysis detection. According to the invention, facial paralysis detection is carried out by using the motion association characteristics between the single-side areas and the symmetrical area characteristics, the accuracy and reliability of facial paralysis detection are improved, weight distribution is realized through the obtained deviation angle vector of each face area, the operation is simple, and the complexity is relatively low; besides, according to the three-dimensional human face muscle model, human face areas are reasonably divided according to different human face muscle distributions, data errors are reduced, and the precision of detection data is improved.
Owner:刘铮

Mask powder with good beauty efficacy

InactiveCN108354888AEffective nourishmentThe anti-wrinkle effect is obviousCosmetic preparationsToilet preparationsMedicineFace muscles
The invention relates to mask powder with good beauty efficacy, which belongs to the field of the preparation of a beauty product. The mask powder is prepared from the following raw materials by massfraction: 10g of fructus tribuli terrestris, 10g of white poria cocos, 10g of silkworm larva, 10g of radix scutellariae, and 10g of cortex dictamni. By adopting the mask powder, the metabolism of thehuman skin can be effectively improved, the face muscles can be improved, and the shaping effect can be achieved.
Owner:韩其芳

Occlusal pad manufactured based on occlusion theory

InactiveCN106344188ANo side effectsRehabilitation effect is remarkableOthrodonticsDiseaseSide effect
The invention discloses an occlusal pad manufactured based on an occlusion theory. The occlusal pad is manufactured by reestablishing the jaw relationship of a patient. The jaw relationship comprises a horizontal jaw relationship and a vertical jaw relationship, wherein the horizontal jaw relationship is obtained by referring to alignment of upper and lower ligula frenula of the patient; the vertical jaw relationship refers to the position relationship of lower jawbones relative to upper jawbones, obtained by causing the patient to make a serious of mouth opening and closing movements and relax muscle at two sides of the face of the patient under the condition that staff detects by hand feeling and / or through a face electromyography that the face muscle of the patient basically relaxes. The occlusal pad manufactured by a method provided by the invention recovers chronic spinal diseases while treating diseases such as temporo-mandibular joint dysfunction syndrome and bruxism, has a remarkable rehabilitation curative effect, do not cause pain, has no side effects on human bodies and prevents patient-hospital disputes.
Owner:嘉兴嘉荣辅助康复器械有限公司

A facial muscle state analysis and evaluation method

PendingCN113033250AEffective maintenance meansUnderstand the state of facial musclesCharacter and pattern recognitionMedical imagesEvaluation resultMedicine
The invention discloses a facial muscle state analysis and evaluation method. The method comprises the following steps: after the face image analysis device is started, capturing a face image of a user through the image capturing unit; analyzing the face image according to an analysis algorithm to obtain a plurality of ideal muscle recognition points corresponding to the five sense organs; identifying the face image according to a fuzzy comparison algorithm and a training model to obtain a plurality of actual muscle identification points corresponding to the muscle state; then, enabling the face image analysis device to evaluate each actual muscle recognition point according to the plurality of ideal muscle recognition points and a pre-stored evaluation rule, and displaying the plurality of ideal muscle recognition points, the plurality of actual muscle recognition points and an evaluation result on a display unit.
Owner:CAL COMP BIG DATA INC

Real-time training method of expression database, and feedback mechanism of expression database

InactiveCN112579815ATo achieve the purpose of training the databaseHigh precisionStill image data indexingDiagnostic recording/measuringEngineeringFace muscles
The invention discloses a real-time training method for an expression database. The method comprises the following steps: S1, inputting in advance: enabling an actor to input expression coordinate sequences of all expressions of the expression database in advance before performance; S2, presetting a range: obtaining a preset range through big data analysis of values of the multidirectional tensionsensors corresponding to all facial feature point positions of each expression; S3, carrying out expression real-time acquisition: when an actor performs, making different expressions, and generatinga set of expression coordinate sequence consistent with the positions of the facial feature points in step S1; S4, comparing and screening: comparing and screening the numerical values of the multidirectional tension sensors corresponding to the positions of the facial feature points of the expression coordinate sequence; and S5, performing multi-sample training: continuously and accurately determining a predetermined range of the facial feature points through a large number of expression coordinate sequences. The motion state of the facial muscles is captured in real time in the performanceprocess, so that the preset range of each muscle of each expression of a specific actor is continuously updated and accurately determined, and the purpose of training a database is achieved.
Owner:SUZHOU YUANRUINI TECH CO LTD

Face dressing for preventing air leakage of breathing mask

InactiveCN105749398AReduce air leakageStable treatment pressureRespiratory masksAdhesiveType ventilator
The invention discloses a face dressing for preventing air leakage of a breathing mask.The face dressing comprises a dressing body, a face adhesive patch and a mask adhesive patch.The two faces of the dressing body are coated with an adhesive to form adhesive layers.The two faces of the dressing body are connected with the face adhesive patch and the mask adhesive patch respectively through the adhesive layers.The gap between the mask and the face is filled with the dressing body, the stability of the fixed position of the mask can be guaranteed, and meanwhile air leakage caused by face muscle movement in the use process of the mask is reduced.By means of the face dressing, the effectiveness of face ventilation is improved, stability of treatment pressure of a breathing machine is guaranteed, and therefore the use comfort degree and compliance of a patient are improved.
Owner:THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIV (GUANGZHOU RESPIRATORY CENT) +1

Use method of head-mounted expression capture device based on facial muscle characteristics and enhancement method of expression data packet

The invention discloses a use method of a head-mounted expression capture device based on human face muscle features, which comprises the following steps: S1, adhering a multi-directional tension sensor to feature points of a face, and adhering circumferential fibers and central axis fibers along the contour of the face; s2, connecting the adjacent multidirectional tension sensors or the circumferential fibers and the middle shaft fibers by using tension fibers to ensure that the multidirectional tension sensors are connected with the tension fibers in at least three directions; s3, wearing the tension band and the image acquisition rod connected with the tension band on the top of the head; s4, when the face makes an expression, enabling the high-speed photographic device in the image acquisition rod to capture the facial expression, and enabling the multidirectional tension sensor at each position to capture a corresponding numerical value; and S5, packaging the data statistical graph of each position and the acquired facial expression static image into an expression data packet. Muscle movement data statistical graphs and expression static images, captured by the device, of thehuman face are packaged into an expression data packet, and convenience is provided for later movie and television special effects.
Owner:SUZHOU YUANRUINI TECH CO LTD

Face anti-aging method based on ultrasonic knife technology

InactiveCN113181570AImprove the activation effectStrengthen self-renewal abilityUltrasound therapyAfter treatmentEngineering
The invention discloses a face anti-aging method based on an ultrasonic knife technology. The method comprises the following steps: determining the face muscle trend and a face aging problem region of a treatment object through the observation of the face contour of the treatment object according to the face contour of the treatment object; dividing a treated object into a cheek area, an apple muscle area, a lip peripheral area, a silkworm lying area, an eye peripheral area, a forehead area, a mandible line area, a neck area and an ear peripheral area according to the facial muscle trend and a facial aging problem area of the treated object, starting a 4.5 mm probe of an ultrasonic knife, and performing dot matrix treatment on the cheek area and the apple muscle area; and starting a 3.0 mm probe of the ultrasonic knife, carrying out dot matrix treatment on the lip peripheral area, the silkworm lying area, the neck area and the mandible line area, starting a 1.5 mm probe of the ultrasonic knife, and carrying out dot matrix treatment on the lip peripheral area, the apple muscle area, the eye peripheral area, the forehead area, the neck area and the ear peripheral area. According to the scheme, the operation of the ultrasonic knife is standardized, so that the activation effect on the skin tissue is optimal after the ultrasonic knife is used for treatment.
Owner:马博

Air filtering device and air filtering method

The invention provides an air filtering device and an air filtering method. The air filtering device comprises a bowl-shaped mask, a nose bridge strip, ear straps and a first magnetic massaging assembly which is arranged on the bowl-shaped mask and used for massaging acupuncture points of the part, attached to the bowl-shaped mask, of a human face, wherein the first magnetic massaging assembly comprises a communication interface, a controller and first magnetic sheets. According to the air filtering device, the first magnetic massaging assembly attached to the human face is arranged on the bowl-shaped mask, the communication interface can receive an instruction from a mobile terminal, therefore, the controller can control the first magnetic sheets to conduct corresponding massaging actions according to the instruction to massage the human body acupuncture points through a magnetic field formed by the magnetic sheets, blood circulation of the face of a user is promoted, and the elasticity of the face muscles of the user is improved; in addition, the air filtering device is convenient to manufacture and wide in application range.
Owner:BEIJING QIHOO TECH CO LTD +1

Evaluation and rehabilitation device and evaluation and training method for tongue muscle and mouth and face muscle

ActiveCN114669013AReal-time display of 3D activity space signalsGymnastic exercisingDiagnostic recording/measuringMuscle forceThree-dimensional space
The invention aims to disclose an evaluation and rehabilitation device and an evaluation and training method for tongue muscles and oral facial muscles. The evaluation and rehabilitation device comprises a flexible surface electromyographic electrode, a control module, a wireless transmitting module and an inertial sensor, the flexible surface electromyographic electrode is electrically connected with the control module, the inertial sensor is electrically connected with the control module, and the wireless transmitting module sends surface electromyographic signals and inertial sensor signals collected by the control module to the display module. In use, the flexible surface myoelectricity electrode is attached to the face muscle or the tongue muscle like a sheet-shaped material, the real-time three-dimensional space position of the face muscle or the tongue muscle can be sensed while the muscle force of the face muscle or the tongue muscle is sensed, the evaluation basis of the face muscle or the tongue muscle can be provided for a doctor, and the accuracy of the face muscle or the tongue muscle can be improved. And the muscle activity range can be evaluated through the change information of the three-dimensional space.
Owner:SUZHOU MUNICIPAL HOSPITAL

Water mirror waterproofing ring and water mirror

The invention relates to a water mirror waterproofing ring and a water mirror, and belongs to the technical field of water mirror structures. According to the water mirror waterproofing ring, the nearend of the water mirror waterproofing ring tilts inwards; according to the water mirror waterproofing ring in the structure, in the process of using, the water mirror waterproofing ring is attached to the face of a user when in pressure, and the near end tilting inwards is in contact with the part position of a human body face; and the water mirror waterproofing ring bears the pressure as a wholeand is pressed towards the human body face, by designing the near end tilting inwards, the near end merely bears force pressing towards the human body face, even the human body face muscles twitch, the condition that the near end turns over outwards cannot be caused, and the waterproof effect is greatly improved.
Owner:SHENZHEN REANSON PROD CO LTD

A Silent Information Recognition System Based on Facial Muscle Sound Signal

The invention relates to a silent information recognition system based on facial muscle sound signals, comprising: a sensor for collecting facial movement signals; a signal conditioning circuit connected to the sensor to perform voltage stabilization and voltage scaling processing on the signals collected by the sensor; a single-chip microcomputer, Connect with the signal conditioning circuit, receive the signal processed by the signal conditioning circuit, and perform signal preprocessing, feature extraction processing and action classification processing on the signal in sequence, and output the classification result; Action classification results and display. Compared with the prior art, the present invention has the advantages of simple structure, good convenience, real-time and accurate transmission of silent signals, and the like.
Owner:EAST CHINA UNIV OF SCI & TECH

Facial expression capturing mask for performance and mounting method thereof

PendingCN112657214ALow costAccurate adhesionArtist equipmentsFiberMedicine
The invention discloses a facial expression capturing mask for performance. The facial expression capturing mask comprises a mask body made of a transparent material and a hoop, the hoop is fixed to the afterbrain of the head, the edge of the hoop is connected with wefts through a plurality of warps in an interwoven mode, and the top and the bottom of the mask body are connected with the hoop through elastic ropes. A fiber frame is arranged on the side, close to the face, of the mask body. The fiber frame adheres to the mask body according to the outline shape of the face; multidirectional tension sensors are arranged on one side of the mask body and located at an ophryon, eyebrows, eye sockets, cheeks, mouth corners and lower jaws respectively, each multidirectional tension sensor is connected with at least three tension fibers, and the multidirectional tension sensors are connected with the fiber frame through the tension fibers. The mask can capture various expressions of an actor, the movement rule of facial muscles of the actor in different expressions is obtained through data statistics, an exclusive expression database of the actor is constructed, convenience is provided for later movie and television special effects, and the cost of later image making and processing is reduced.
Owner:SUZHOU YUANRUINI TECH CO LTD

Facial muscle feature point automatic marking method

The invention discloses a method for automatically marking facial muscle feature points, which is applied to a facial image analysis device and comprises the following steps of: collecting a to-be-recognized image containing the face of a user; executing a face recognition program on the to-be-recognized image to obtain a plurality of strong reference points on the face; performing fuzzy comparison on the to-be-recognized image based on a pre-trained training model and generating an recognition result; marking a plurality of muscle feature points on the to-be-recognized image according to the recognition result, wherein the plurality of muscle feature points respectively fall on a plurality of weak reference points on the face; and displaying the to-be-recognized image and the plurality of muscle feature points in an overlapping manner through a display unit. According to the invention, a plurality of muscle feature points for representing the facial muscle state can be automatically marked on the facial image of the user.
Owner:CAL COMP BIG DATA INC

Micro-expression lie detector based on laser-induced graphene sensor

The invention discloses a micro-expression lie detector based on a laser-induced graphene sensor, which is characterized in that laser-induced graphene is utilized to prepare a flexible electronic skin sensor, and the flexible electronic skin sensor is attached to the facial muscle of a person to be examined to detect the change of the facial muscle so as to obtain the characteristic waveform of the facial expression; when the examined person generates the micro-expression, the waveform has corresponding characteristic change, and a lie detection result is obtained.
Owner:ZHEJIANG SCI-TECH UNIV

Language analysis, recognition and recording device suitable for digital film and television development

The invention provides a language analysis, recognition and recording device suitable for digital film and television development. The language analysis, recognition and recording device comprises a shell device. The shell device is fixedly connected to the supporting device; six opening and closing devices are connected to the shell device in a sliding mode, and the structures of the six opening and closing devices are the same. The six opening and closing devices are fixedly connected with reset parts correspondingly. The front sides of the six opening and closing devices are fixedly connected with noise reduction parts correspondingly, and the backs of the noise reduction parts are attached to the front side end face of the shell device. The interior of the shell device is fixedly connected with a driving device; the face analysis device is fixedly connected to the shell device, a positioning driving part is fixedly connected to the face analysis device, the face analysis device is arranged, and the face analysis device adopts a camera installed on the shell device so that the lip position, the lip movement and the face muscle movement can be recorded; and auxiliary synchronous recording can be carried out by better matching with sound recording.
Owner:山东东葳电子科技有限公司

Oral cavity saliva suction cotton and saliva suction article using saliva suction cotton

PendingCN108542529AAvoid eating saliva absorbent cotton by mistakeAvoid chokingSaliva removersOral secretionsFace muscles
The invention relates to the field of medical care articles, in particular to oral cavity saliva suction cotton and a saliva suction article using the saliva suction cotton. The saliva suction articlecomprises the saliva suction cotton, wherein the saliva suction cotton comprises a saliva suction cotton core; the saliva suction cotton core is made of water suction resin materials. The saliva suction cotton core uses water suction resin, so that after the saliva suction cotton sucks oral cavity secretion in the oral cavity, the saliva suction cotton is under the condition of the extrusion caused by activities of face muscle and activities in the oral cavity, and the oral secretion sucked by the saliva suction cotton cannot be extruded out. The conditions that in the prior art, the sponge is used as an adsorption material, when the sponge is extruded, the oral secretion sucked in the sponge is extruded back into the oral cavity of the user again can be avoided. The saliva suction article provided by the invention is suitable for patients with breathe and deglutition disorder; the bucking of patients with breathe and deglutition disorder due to the oral cavity secretion can be avoided.
Owner:THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV
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