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63results about How to "Without hindrance" patented technology

Multifunctional degradable liquid-state mulch film and its preparing method

The invention relates to multifunction degradable pollutant liquid mulching film and its preparation method. It includes the following steps: using the degradability of the polyvinyl alcohol and starch, the water retention property of the acrylic acid polymer to synthesize starch group polymer; diluting by water to spray for forming. The mulching film has the advantages of convenient using, low cost, preventing water content from evaporating, degradable, wide application range such as agriculture production, forestation etc.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES

Startup method for embedded operation system

The invention relates to a startup method for an embedded operation system. The startup method comprises the following steps: (101) starting up BOOT; (102) checking and judging whether first BOOT data are correct or not, if so, turning into next step and otherwise, covering the first BOOT data with second BOOT data which are checked to be correct and turning into the step (105); (105) loading the BOOT data which are checked to be correct; (106) checking and judging whether first OS data are correct or not, if so, turning into next step and otherwise, covering the first OS (Operation System) data with second first OS data which are checked to be correct and turning into the step (109); (109) loading the OS data which are checked to be correct; and (110) ending guidance and normally boosting. According to the startup method, the problems that the boosting cannot be realized, the boosting frame is stayed and the running speed of the machine is low can be solved or greatly reduced, and no extra production is generated.
Owner:AUTOLINK ELECTRONICS

Binding element and plurality of binding elements particularly suited for automated processes

InactiveCN101022961AWinding reduction or avoidanceDoes not interfere with final appearanceFiling appliancesAdhesiveEngineering
A plurality of binding elements (50), each of a substantially uniform thickness, the fingers (54) being looped over and coupled to the spine (52) such that the inner surface of the fingers (54) is disposed against the inner surface (66) of the spine (52) by an adhesive (80) when assembled. In an embodiment, at least a portion (102) of the outer surface (68) of the binding element (50) is resistant to a more permanent attachment to the adhesive (80) such that a plurality may be stacked together, and successively decoupled or removed for insertion into a stack. The binding elements (50) may include score lines or bends (90) in the fingers (54) to provide a rounded closed loop structure; optional gussets (134) in the bends (90) inhibit the straightening of the fingers (54). The fingers (54) optionally include variations in cross-section (82) along the length to relieve certain stresses to inhibit the looped finger (54). The binding elements (50) optionally include structure for facilitating interaction with an automating binding process.
Owner:GEN BINDING

Waterproof and breathable composite membrane

InactiveCN105459528APrevent water and dust from getting inside the electronicsAvoid enteringSynthetic resin layered productsElectrical equipmentEngineeringMucilage
The invention provides a waterproof and breathable composite membrane which comprises three layers of structures which are sequentially arranged and connected with one another. The front face and reverse face of a supporting layer are connected with a waterproof and breathable membrane and a protection layer through mucilage glue respectively, both the supporting layer and the protection layer are provided with corresponding holes, and the holes are only covered with the waterproof and breathable membrane. The waterproof and breathable composite membrane has the advantages that by the adoption of the technical scheme, the waterproof and breathable composite membrane is pasted to a through hole of an electronic product, and external water and dust can be effectively prevented from entering the electronic product while transfer of sound is not interfered with.
Owner:TIANJIN RIJIN TECH

A nonaqueous electrolyte for lithium secondary battery

The invention relates to a non-water electrolyte for lithium secondary cell, containing: (i) lithium salt; (ii) non-water organic solvent; (iii) an additive containing at least a halogen alkene compound which contains hydrogen, alkyl, cycloalkyl, thiazolinyl, aryl or halogen, as well as F, Cl, Br or I; the additive accounts for 0.1-10wt% of total weight of the non-water organic solvent. The invention uses the above additive before the decomposition of the organic solvent of the electrolyte and can form a layer of compact and stable solid electrolyte interface film on graphite cathode surface, thus furthest inhibiting the decomposition of the electrolyte and then improving the charge-discharge efficiency and circulating property of the lithium secondary cell.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI

Baseboard structure for small size motorcycle

A floor structure for a scooter-typed vehicle is provided to improve comfortableness of pedal actuation by installing a footrest on a floor and carry an article on the floor without interfering with the footrest. A footrest(15) is pivotally supported to a hinge(42) on a floor panel(11) through a hinge shaft(45). When using the floor panel with the footrest being laid down, a foot is put on the footrest to easily actuate a rear brake pedal(14). In the case of carrying a large freight(87) on the floor panel, the footrest is rotated toward a front to stand up and provide a wide space for the freight. The footrest is disposed at approximately center of the floor relative to the rear brake pedal. The foot rest includes a resilient member for biasing the footrest and a footrest cover for covering a lower portion.
Owner:HONDA MOTOR CO LTD

Information processor, information processing method, and computer program

An information processor includes: a playback position holder configured to hold a content playback position at which a user starts inputting a comment on content that is being played back; and a comment information holder configured to hold the comment input by the user in association with the content playback position held by the playback position holder.
Owner:SONY CORP

Preparation method of up-conversion luminescence EVA photovoltaic film

The invention relates to the field of photovoltaic film technology, especially to a preparation method of an up-conversion luminescence EVA photovoltaic film. The preparation method comprises the following steps: fully mixing an ethylene-vinyl acetate copolymer with an up-conversion luminescence agent, an anti-oxidant, a cross-linking agent and a silane coupling agent in proportion, adopting a tape-casting process, mixing, extruding, tape-casting, measuring thicknes, knurling, sizing, trimming, rolling, and packaging. The temperature of a first heating zone of an extruder is 260-320 DEG C; the temperature of a second heating zone is 320-400 DEG C; the temperature of a third heating zone is 330-400 DEG C; the temperature of a connecting zone is 330-400 DEG C; and the temperature of a net changing zone is 330-400 DEG C. The selected up-conversion luminescence material contains an ethene-acrylic polymer and has good compatibility with the main-body EVA resin. Light transmittance of the film at 400-1200 nm can reach 90% and above, and the use of ultraviolet-visible light by a solar cell is not obstructed.
Owner:CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL

Sound pick up equipment, controller, sound effect device component and electric stringed instrument

InactiveCN101593513AThe problem of suppressing noise pickupReliable conversionElectrophonic musical instrumentsMusical toneEngineering
The invention provides a sound pick up equipment and an electric stringed instrument which can convert the original tone of stringed instrument into the electrical signal and has no influence on the tone. Furthermore, the invention also provides, a sound effect device component, an electric stringed instrument, and a controller which is convenient to operate, has no influence on the performance, and can output the defined signal to the sound effect device. When the sound effect device (3) is mounted on urheen, a condenser transmitter (339) and a window (223) are opposite to each other with little space, and the height of a distance set-up interface (311) is lower than the one of the distance set-up interface of window centre (X). The shell of the controller (4) is provided with a worktop (46) arranged with operation buttons (41-45), a covering surface (47) opposite to the worktop, and side faces (48a, 48b). The controller is disposed in the manner of covering the covering surface on the side of the urheen stem opposite to the chords (241, 242), therefore the worktop is between the urheen stem and the chords, performer can easily operate the button and performance will not be influenced.
Owner:ROLAND CORP

Diabetic-foot limb microenvironment accurate-treatment cabin based on 3D printing

The invention discloses a diabetic-foot limb microenvironment accurate-treatment cabin based on 3D printing. The diabetic-foot limb microenvironment accurate treatment cabin comprises a treatment cabin I, a treatment cabin II and a moving part which are molded on the basis of 3D printing, wherein the treatment cabin I is in a shape conforming to the shape of the leg part; the treatment cabin II is in a boot shape and comprises a foot part and a bootleg part; a gap part is arranged at the rear part of the bootleg part; the moving part has a shape matched with the gap part; the moving part is connected on the gap part in a sealing part to form a complete bootleg shape with the bootleg part; the lower end of the treatment cabin I is connected with the upper end of the treatment cabin II and the upper end of the moving part in a sealing manner; the treatment cabin I is provided with a purifying device joint, an oxygen joint and a temperature-humidity sensor; the purifying device joint is connected with an air purifying device which is connected with a positive-pressure and negative-pressure pump; a liquid drainage tube is arranged at the rear part of the treatment cabin I; two air bags A are arranged at the inner side of the front part of the bootleg part of the treatment cabin II; two air bags B are arranged at the inner side of the moving part; and the treatment cabin I, the treatment cabin II and the moving part are respectively made of transparent materials.
Owner:山东泉志医疗科技有限责任公司

Self-service device and counting method thereof

InactiveCN105989664AConfirmed status maintenanceWithout hindranceCoin countersBank accountEngineering
The invention discloses a self-service device, which comprises circulating currency boxes, an identification part, a recycling currency box, a supplementing / recycling currency box and a control part, wherein each circulating currency box is used for accommodating currency for deposit and withdrawal transactions; the identification part is used for identifying currency transmitted in the self-service device; the recycling currency box accommodates the above currency: currency which is judged to be recycling currency by the identification part when deposit and withdrawal transactions are carried out by the recycling currency box and currency which is judged to be recycling currency by the identification part when automatic counting is carried out; the supplementing / recycling currency box can transmit currency with each circulating currency box; and the control part carries out transmission after automatic recovery in a state with determined balance in bank accounting and in a condition in which automatic recovery of the self-service device succeeds and calculates the currency balance after automatic recovery in the recycling currency box according to the currency balance before and after automatic recovery in the recycling currency box and the supplementing / recycling currency box, and thus, the balance determination state in the bank account can be continued.
Owner:HITACHI FINANCIAL EQUIP SYST SHEN ZHEN +1

Bus braking stop energy recovery device

Disclosed is a bus braking stop energy recovery device. On a road of an area where a bus stops, two rectangular pits are arranged according to wheel base of the bus, a hydraulic power generator, an ECU (electronic control unit), a storage battery, multiple water tanks, a water pipe and the like are arranged in each pit, a piston is arranged in each water tank, each piston rod penetrates through the top of the corresponding water tank in a vertical upwards manner, and top ends of the water tanks are connected with road pressure discs which vertically move up and down along with the pistons. The device has two states including a standby state and a working state, in the standby state, along the traveling direction of the bus, the first pressure disc is positioned at an ascending high position, other pressure discs are positioned at descending low positions; and in the working state, along the traveling direction of the bus, the pressure disc that the bus is about to press is positioned at the ascending high position, and other pressure discs are positioned at the descending low positions. The bus braking stop energy recovery device can effectively assist a vehicle in speed reduction at a stop area to enable the vehicle to be stable in speed reduction so as to reduce vibratory sensation and guarantee riding comfortableness; and by the bus braking stop energy recovery device, kinetic energy of the bus can be effectively converted into electric energy, so that energy conservation and environment protection are realized.
Owner:SHANGHAI UNIV OF ENG SCI

Spraying system and method for water-washing ammonia gas for preparing synthetic ammonia

The invention relates to the technical field of chemical gas processing, in particular to a washing ammonia spraying system and method for preparing synthetic ammonia, the washing ammonia spraying system comprises a support frame, a spraying barrel and a spraying device, the spraying barrel is mounted on the support frame, and the spraying device is inserted into the upper end of the spraying barrel. The invention can solve the problems that when the existing equipment is used for removing ammonia from the process gas, the spraying equipment in the water scrubber cannot realize circumferential rotation, and the water diffusion range is always kept unchanged, so that the process gas easily passes through the outside of the water spraying range, the ammonia removal effect of the process gas is reduced, and the like. According to the washing ammonia gas spraying system for preparing synthetic ammonia, the spraying mechanism is matched with the driving motor and the transmission gear, so that the spraying mechanism can obliquely move in the circumferential direction, the water spraying range of the spraying mechanism is enlarged, the contact area of water and process gas is increased, and the removal effect of ammonia gas in the process gas is improved.
Owner:西安旭旌再生资源有限公司

New waterproof breathable composite membrane

A new waterproof breathable composite membrane includes a seven-layer structure, a protective layer A is connected with a support layer via an adhesive layer A, the support layer is connected with a waterproof breathable membrane through an adhesive layer B, the waterproof breathable membrane is connected with a protective layer B via an adhesive layer C, the protective layer A, the adhesive layer A, the support layer, the adhesive layer B, the adhesive layer C and the protective layer B are respectively provided with a corresponding hole, and the holes are only covered with the waterproof breathable membrane. The beneficial effects are that: the new waterproof breathable composite membrane can be pasted in a through hole of an electronic product to effectively prevent water and dust from outside to enter the electronic product without obstruction of transfer of sounds.
Owner:TIANJIN RIJIN TECH

Intelligent emergency transport cabin suitable for infectious disease isolation

The invention relates to an intelligent emergency transport cabin suitable for infectious disease isolation. The cabin comprises a cabin body, wherein a physiological information and / or environmentalinformation acquisition and monitoring device can be arranged in the cabin body, a communication system capable of communicating with an ambulance and a remote medical center is also arranged in the cabin body, the cabin body is provided with an air inlet channel, an air outlet channel and a disinfection device, the air outlet channel is connected into a disinfection device, an ultraviolet lamp for sterilization and / or a sterilization filter layer are / is arranged in a disinfection bin of the disinfection device, a filter material of the sterilization filter layer contains disinfectant, the airinlet channel of the cabin body is arranged on the side wall and / or a bottom plate of the head side cabin body, a micro through hole structure or a filter structure is preferably adopted, the air outlet channel of the cabin body is arranged on the bottom plate and / or the side wall of the foot side cabin body, and a small through hole structure is preferably adopted. According to the cabin, a moresuitable environmental condition can be created for a patient, and the risk of infectious disease transmission in the transport process is avoided.
Owner:PEOPLES HOSPITAL PEKING UNIV

Composite material

The invention provides a composite material which comprises a three-layer structure. A waterproof and breathable material and a protection layer are bonded together through a bonding function layer, the protection layer is provided with a hole, and the hole is only covered with the breathable material. The composite material has the advantages that by the adoption of the technical scheme, the composite material is bonded to a through hole of an electronic product, external water and dust can be prevented from entering the electronic product, and transfer of sound is not hindered.
Owner:TIANJIN RIJIN TECH

Plant efficient remediation method for cadmium standard-exceeding soil of sunlight greenhouse

The invention belongs to the field of soil remediation, and particularly relates to a plant efficient remediation method for cadmium standard-exceeding soil of a solar greenhouse. A cadmium activatingagent is applied to to-be-remediated soil for blending, then corn is planted, soil is irrigated before corn plants are harvested, then the whole plants are pulled out, and remediation of the to-be-treated soil can be achieved. According to the invention, 20-80g of the cadmium activating agent is added into every 1kg of the to-be-remediated soil (in terms of dry soil). Plant (corn) planting and the cadmium activating agent are adopted to jointly restore soil, conversion of the cadmium element in the invalid state of the sunlight greenhouse soil into the available state is improved, accordingly, the plant restoration efficiency is improved, and technical supports are provided for food safety, people health and social stability.
Owner:VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI

Cadmium activating agent for improving remediation efficiency of cadmium-contaminated soil in solar greenhouse and application thereof

The invention belongs to the field of soil remediation, and particularly relates to a cadmium activating agent for improving remediation efficiency of cadmium-contaminated soil in a solar greenhouse and application of the cadmium activating agent. The cadmium activating agent is prepared from the following components in parts by weight: 2 to 5 parts of glucose, 10 to 20 parts of ammonium bicarbonate, 10 to 20 parts of urea, 100 to 300 parts of sulfur powder, 50 to 100 parts of humic acid, 0.2 to 0.5 part of bacillus megaterium and 0.1 to 0.5 part of bacillus subtilis. The raw materials of thecadmium activating agent have no environmental risk, glucose, humic acid and the like in the components can provide precious carbon sources for soil microorganisms; ammonium bicarbonate, urea, sulfurpowder and the like are fertilizer sources for crop growth, and bacillus megatherium and the like can improve the effectiveness of soil phosphorus.
Owner:VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI

Cleaning inserts for vacuum cleaners

A cleaning insert, in particular for vacuum cleaners, comprising: a housing (3); a connection (18) for the suction pipe; a suction opening (6) for ambient air; arranged in the housing (3, 63), a plasma generator (2) for generating a plasma; and at least one cleaning opening (10, 14) or channel at which a plasma and air The mixture hits the surface (11) to be cleaned, after which it is sucked into the housing (3) and sucked away via the connection (18). As a result, the cleaning insert can also treat air and debris in a sterilizing and deodorizing manner.
Owner:REINHAUSEN PLASMA

Multifunctional degradable liquid-state mulch film and its preparing method

The invention relates to multifunction degradable pollutant liquid mulching film and its preparation method. It includes the following steps: using the degradability of the polyvinyl alcohol and starch, the water retention property of the acrylic acid polymer to synthesize starch group polymer; diluting by water to spray for forming. The mulching film has the advantages of convenient using, low cost, preventing water content from evaporating, degradable, wide application range such as agriculture production, forestation etc.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES

Bi-directional 3D ultrasonic scalpel

InactiveCN107280734AReduce direct vibrationHigh vibration frequencySurgeryEngineeringOpen type
The invention discloses a bi-directional 3D ultrasonic scalpel. The bi-directional 3D ultrasonic scalpel comprises a vibration base. The bottom of the vibration base is provided with an ultrasonic vibrator. The vibration base of the upper part of the vibrator is installed in the solid mode, and the upper end of the vibrator is provided with two vibration grooves. Two sleeves are installed in the vibration grooves, and the interiors of the sleeves are provided with inside thread structures. The openings of two sleeves are open-type structures, and knife bars are installed in the sleeves. The bi-directional 3D ultrasonic scalpel is capable of fixing the position of the sleeves by a locking nut, so that the elastic connection is changed into the rigid connection, and the choices are various. The bi-directional 3D ultrasonic scalpel is provided with two different blades, and two blades are oppositely installed, so the use is not hindered, and the using range is increased.
Owner:芜湖启泽信息技术有限公司

Electronic device for preventing malfunction of touch panel and method for preventing malfunction

The present invention relates to an electronic device that prevents malfunction of a touch panel and a method for preventing malfunction. An electronic device equipped with a wireless module and a touch panel prevents malfunction of the touch panel. An NFC coil (21) is arranged below the touch panel (19). During NFC, the NFC card (51) is close to the surface of the touch panel (19). The touch controller sets the finger detection sensitivity as a reference value when the NFC module does not emit alternating magnetic flux. The touch controller reduces the detection sensitivity at the moment when the NFC coil (21) starts emitting alternating magnetic flux. The touch controller returns the detection sensitivity to the reference value at the moment when the NFC coil (21) stops emitting alternating magnetic flux. For the signal of the touch controller changing the detection sensitivity, the NFC module sends it directly to the touch controller through the hardware line.
Owner:LENOVO PC INT

A nonaqueous electrolyte for lithium secondary battery

The invention relates to a non-water electrolyte for lithium secondary cell, containing: (i) lithium salt; (ii) non-water organic solvent; (iii) an additive containing at least a halogen alkene compound which contains hydrogen, alkyl, cycloalkyl, thiazolinyl, aryl or halogen, as well as F, Cl, Br or I; the additive accounts for 0.1-10wt% of total weight of the non-water organic solvent. The invention uses the above additive before the decomposition of the organic solvent of the electrolyte and can form a layer of compact and stable solid electrolyte interface film on graphite cathode surface, thus furthest inhibiting the decomposition of the electrolyte and then improving the charge-discharge efficiency and circulating property of the lithium secondary cell.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI

Baseboard structure for small size motorcycle

A floor structure for a scooter-typed vehicle is provided to improve comfortableness of pedal actuation by installing a footrest on a floor and carry an article on the floor without interfering with the footrest. A footrest(15) is pivotally supported to a hinge(42) on a floor panel(11) through a hinge shaft(45). When using the floor panel with the footrest being laid down, a foot is put on the footrest to easily actuate a rear brake pedal(14). In the case of carrying a large freight(87) on the floor panel, the footrest is rotated toward a front to stand up and provide a wide space for the freight. The footrest is disposed at approximately center of the floor relative to the rear brake pedal. The foot rest includes a resilient member for biasing the footrest and a footrest cover for covering a lower portion.
Owner:HONDA MOTOR CO LTD

Tunnel double-layer inverted arch construction formwork, trestle and construction method

The invention discloses a tunnel double-layer inverted arch construction formwork. The construction formwork comprises a formwork assembly, tracks, a moving trolley and a lifting component, wherein the tracks are arranged in the longitudinal direction of inverted arches, the moving trolley is arranged on the tracks, the lifting component is arranged on the moving trolley and connected with the formwork assembly, the formwork assembly comprises a plurality of arc-shaped branch plates, and every two adjacent arc-shaped branch plates are hinged. The invention further discloses a trestle. The trestle comprises two main beams arranged in parallel and further comprises the tunnel double-layer inverted arch construction formwork, and the two tracks are arranged on the outer sides of the two mainbeams correspondingly. A construction method comprises the steps that S1, a lower-layer inverted arch of a first to-be-constructed area is poured; S2, a lower-layer inverted arch of a second to-be-constructed area is poured; S3, an upper-layer inverted arch of the first to-be-constructed area is poured; and S4, an upper-layer inverted arch of the second to-be-constructed area is poured. Accordingto the tunnel double-layer inverted arch construction formwork, the trestle and the construction method, the advantages of saving the cost, guaranteeing the construction quality, being small in occupied space, convenient in use and the like are achieved.
Owner:HUNAN WUXIN MACHINERY

Visual impaired person stair detecting glasses based on RGB-D camera and stereophonic sound

The invention discloses a visual impaired person stair detection system and method based on an RGB-D camera and stereophonic sound. The method comprises the steps that the RGB-D camera is used for collecting a depth image, and an attitude angle sensor is used for obtaining attitude angle information of the camera; a small processor utilizes the depth information and the attitude angle information for calculation to obtain three-dimensional coordinates and surface normal vector information, the surface normal vector information is used for performing extraction on a plane in a three-dimensional scene, whether stairs exist in the current scene or not is judged, if the stairs exist, the distance and direction of each stair are calculated, and finally bone conduction earphones are used for transmitting the distance and the direction to visual impaired persons for assistance. The requirement of the visual impaired persons for predicting stairs can be well met.
Owner:杭州视氪科技有限公司

Multifunctional waterproof and air-permeable composite

The invention provides a multifunctional waterproof and air-permeable composite. The multifunctional waterproof and air-permeable composite comprises three layers of structures which are sequentially arranged and mutually connected, a waterproof and air-permeable membrane and a protective layer A are adhered together through an adhesive layer A, holes are formed in the protective layer A, and the holes are only covered with the waterproof and air-permeable membrane. The multifunctional waterproof and air-permeable composite has the advantages that according to the technical scheme, the multifunctional waterproof and air-permeable composite sticks to a through hole of an electronic product; on one hand, external water and dust can be effectively prevented from entering the interior of the electronic product; on the other hand, transmission of sound is not hampered.
Owner:TIANJIN RIJIN TECH

Dining table advertising device

The invention discloses a dining table advertising device. The dining table advertising device comprises a fixed turntable, hollow supporting legs are installed at the bottom of the fixed table plate,servo motors are installed in the supporting legs, and insulating shells are arranged outside the servo motors. The output end of the servo motor is connected with a rotating shaft, the outer surfaceof the rotating shaft is connected with a plurality of supporting arms, supporting points are arranged on the supporting arms, and transparent rotating discs are installed on the supporting legs; a mounting groove is formed in the center of the transparent turntable, and an advertising device body is mounted in the mounting groove; an annular display screen is arranged on the outer surface of theadvertising device body, the display screen is electrically connected with a display screen assembly, and the display screen assembly is installed in the advertising device body. The display screen comprises a control system and a signal transmission system. According to the dining table advertising device provided by the invention, the display screen arranged in the center of the dining table isused for putting and displaying dynamic advertisements, so that the publicity of the advertising device is improved.
Owner:安徽金誉堂文化产业发展有限公司

Hollow seat of series Qinhu

The invention relates to hollow bases of series of Qinhu, which is characterized in that the hollow bases are produced by selected mum SPP and Acer mono, the two sides of the base and the middle are stitched into rectangular opening groove type the same as the type of the bottom of the Qin cylinder respectively with mum SPP and Acer mono, the two lateral plates of the bases and the Qin cylinder are equipped with a gap, a rectangular dent is arranged in the middle of the plane in the base, the outer of the base is coated with black enamel paint. The hollow base has the advantages and effects that resonating cavity can be increased to avoid the blocking of the voice vibration, causes the happening of voice richer, the overtone is rich, the fading speed of voice is reduced, integrally increases resonant vibration function, which is favorable for strengthening sound volume, increasing sounding efficiency, adding reverberation effect and prolonging the time of the lingering sound.
Owner:XIAN CONSERVATORY OF MUSIC
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