74 results about "Foreign Body Removal" patented technology

A foreign matter removal device may include a chamber comprising a fluid, and a magnet assembly under the chamber. The chamber may include a loading section configured to load a first object, a second object, and a third object into the fluid, a first trap region configured to trap the first object, a second trap region configured to trap the second object and to be adjacent to the first trap region, and a third trap region configured to trap the third object and to be adjacent to the second trap region. The first object is a first foreign matter, the second object is a semiconductor light-emitting element, and the third object is a second foreign matter.

The invention belongs to the technical field of medical instruments, and discloses a handheld portable high-definition visual maxillary sinus foreign body taking endoscope which comprises a control main body and a flexible probe, the control main body is provided with an operation panel, an adjusting knob and a pressing type switch, and the flexible probe is connected with the main body through a quick connecting mechanism. The far-end function module group comprises a camera, an LED light source, a mechanical grabbing device and a functional pipeline interface, the equipment controls the action of a bending section through a gear transmission assembly, a connecting rod mechanism realizes mechanical grabbing, a flushing pump and a negative pressure suction device cooperate to ensure clear visual field, and a wireless transmission module sends an image to an intelligent terminal. The whole design is compact and portable, the operation process is simplified, the accuracy and efficiency are improved, the problems of large trauma, high cost and the like in the prior art are solved, and the practical value is remarkable.

The invention discloses a cornea foreign body removal training device. The cornea foreign body removal training device mainly comprises an operation table, the device is characterized in that a head model, an auxiliary supporting mechanism and an auxiliary removing mechanism are arranged on the operation table; the human head model is provided with a simulated cornea module, and a foreign body block is embedded in the simulated cornea module and used for simulating the embedding of a foreign body in a human eyeball cornea; the auxiliary supporting mechanism comprises a reset elastic piece and an auxiliary supporting plate used for supporting the arm of the human body. One end of the reset elastic piece is connected with the operation table, and the other end of the reset elastic piece is connected with the auxiliary supporting plate. The auxiliary supporting plate, the reset elastic piece and the operation table are sequentially arranged in the gravity direction. The auxiliary removing mechanism comprises a wrist supporting part, a suspension arm, a removing needle and a distance measuring alarm device. The wrist supporting part is connected with the auxiliary supporting plate; the distance measuring alarm device comprises a distance measuring device, an alarm and a control device. The device has the advantages of simple structure, good training effect and the like.

The utility model provides a structure for removing foreign matters on a medicine packing material injection blow-molded product and an injection blow-molded mold, the structure for removing foreign matters on the medicine packing material injection blow-molded product comprises an upper blow-molded mold assembly provided with an upper neck blowing block, a lower blow-molded mold assembly provided with a lower neck blowing block, and a plurality of blow-molded cavities, a parison cavity communicated with the blow molding cavity is formed between the upper neck blowing block and the lower neck blowing block, and a circulating air path is arranged on the peripheral side of the parison cavity; an air blowing pipeline and an air outlet chip removal pipeline which are independent from each other are mounted in at least one of the upper blowing mold assembly and the lower blowing mold assembly; an air blowing channel and an air outlet chip removal channel which are mutually independent are formed in at least one of the upper neck blowing block and the lower neck blowing block; the air blowing pipeline, the air blowing channel and the circulating air channel are sequentially communicated, and the circulating air channel, the air outlet chip removal channel and the air blowing pipeline are sequentially communicated. According to the device, the foreign matter in the parison cavity is automatically removed and discharged, time and labor are saved, efficiency is high, and it is ensured that each medicine packing material product is automatically blown and washed clean.

The invention relates to the technical field of power obstacle clearing, and discloses a distribution network overhead line multifunctional part combined foreign matter clearing device, which comprises an insulating rod, a supporting seat is coaxially arranged at the top of the insulating rod, a supporting arm is arranged on the supporting seat, and the supporting arm can be rotationally adjusted relative to the supporting seat; a mounting seat is arranged on one side of the supporting arm, mounting grooves are formed in the mounting seat, and the distance between the mounting grooves is adjustable; the power distribution network overhead line obstacle clearing tool can be used in cooperation with various obstacle clearing tools, the number of carried tools is reduced, the workload is reduced, and the convenience and efficiency of power distribution network overhead line obstacle clearing operation are improved.

The invention discloses a child emergency treatment respiratory tract foreign matter rapid removing device, relates to the technical field of respiratory tract foreign matter removing, and aims to solve the technical problem that existing negative pressure suction equipment is too large in negative pressure and prone to directly adsorbing laryngeal mucosa to cause injury. Comprising a hose adaptively communicated with the input end of a negative pressure suction tube, a leakage connector, an annular groove, a removing mechanism, a collecting assembly and an angle adjusting assembly. By means of meshing or non-meshing switching of the transmission rod and the conveying cylinder, the two working states of lower cone rotating collection and upper cone sealing extraction of the guide sealing module can be flexibly adjusted and controlled, in the non-meshing state, the guide sealing module is in a lower cone shape and rotates with a gap reserved, throat mucus can be actively drawn in, and hard extrusion to the delicate throat is avoided; during meshing, the module moves upwards to be in a sealed upper cone shape, negative pressure extraction and spiral groove path optimization are matched, discomfort of the throat of a child caused by too high local negative pressure is prevented, high-viscosity mucus fracture can be avoided, and it is guaranteed that mucus is rapidly and thoroughly discharged.

The invention discloses a foreign matter removing device for a track contact network, and relates to the technical field of track contact networks, the foreign matter removing device comprises a box type walking vehicle, two rhombic telescopic frames are arranged in the box type walking vehicle, a base is horizontally connected between the upper ends of the two rhombic telescopic frames, and a mechanical arm is installed on the upper portion of the base. According to the foreign matter removing device for the track overhead line system, by integrating three removing mechanisms of flame jetting, water flow flushing and mechanical clamping, flexible switching and collaborative operation of foreign matter removing modes are achieved. Under the transmission action of a servo motor and a gear rack, a flame injection pipe and a water flow injection pipe can move reversely to complete stretching and storage, precise positioning is matched with a mechanical arm, the structure of foreign matter is damaged through flame combustion, then residual chippings are flushed through high-pressure water flow, and if stubborn foreign matter still exists, a claw driven by an electric push rod can further clamp and remove the stubborn foreign matter; and due to the stepped action of the triple means, the cleaning efficiency and thoroughness of complex foreign matters are remarkably improved.

The utility model provides a kind of canning line foreign matter detection tank turning mechanism, it is related to canning production line technical field, including workbench one and workbench two, workbench two is equipped with mounting pedestal, a pair of installation side frames is installed on mounting pedestal, installation top plate is installed on the pair of installation side frames, link is movably installed in the bottom of installation top plate, the bottom of link is equipped with several knock balls, collection groove is equipped with suction air inlet in the bottom end in the pair of installation side frames between on mounting pedestal, workbench one and workbench two are all equipped with a pair of side plates, conveyor is installed between the pair of side plates, workbench one is installed with turnover machine in the one end of mounting pedestal, the bottom end of turnover machine is connected with the pair of installation side frames.This device is knocked to the top of the tank body by knock ball, is favorable to the granular matter inside tank body drop, is convenient for tank body foreign matter removal, improves tank body production efficiency and quality.

To remove a foreign substance which is generated when inserting an expansion blade part between segment coils.SOLUTION: A foreign substance removal system comprises: a processing station which molds a front end of a segment coil; and a foreign substance removal station including a blade table on which an expansion blade part transferred from the processing station by a transfer section is mounted, a table rotation section for rotating the blade table around an axis of the expansion blade part, an air blow section which is provided on a lateral of the blade table and blows air to a rear end of the expansion blade part on the blade table, an air blow suction section which is provided at a position opposite to the air blow section and sucks air from the air blow section, a rotary brush section which rotates a brush part while pressing the brush part to the front end of the expansion blade part on the blade table, and a brush suction section which is provided in the rotary brush section and sucks a foreign substance deposited to the brush part.SELECTED DRAWING: Figure 1

The invention relates to a surgical instrument for rapidly taking out large foreign matters on the pharynx and rapidly relieving airway obstruction. The foreign body forceps are generally made of cold steel or high-speed tool steel, and mainly comprise two parts, namely a forceps head and forceps handles. The forceps head and the neck portion are bent downwards in an arc shape by 60 degrees, the head portion is a long oval ring, and teeth are arranged on the inner face. The forceps handle parts are respectively provided with a ring, and fingers can be sleeved in the rings when the forceps are used. The device can help to quickly take out large foreign matters in the pharyngeal cavity, quickly relieve airway obstruction, is convenient to disinfect, can be repeatedly used, and can be widely used for taking out large blocked foreign matters in the pharyngeal cavity in the otolaryngology department, the pediatric department, the emergency department and the like.

This invention relates to the field of power grid operation and maintenance technology, and discloses a foreign object removal device for a multi-functional assembly of overhead distribution lines. The device includes an insulating rod with a mounting frame at its top. A motor and a battery supplying power to the motor are mounted on the mounting frame. A cutting saw blade is connected to the motor's shaft. A protective plate is elastically mounted on the mounting frame, with a clearance groove at the top of the protective plate corresponding to the cutting saw blade. Initially, the top of the cutting saw blade does not protrude from the clearance groove. A pulling rope is mounted on the protective plate, extending to the lower part of the insulating rod. This invention has a simple structure, low cost, convenient operation, and controllable precision, effectively reducing the probability of cable damage during obstacle removal and ensuring operational safety.

The utility model provides an airway foreign matter taking-out device and equipment, and belongs to the technical field of foreign matter taking-out equipment. The device comprises a conveying catheter and an object taking part, the object taking part is arranged on the conveying catheter, and the object taking part is located at the end, stretching into the trachea, of the conveying catheter; an object taking net is arranged in the object taking part, the object taking net can expand to open a mesh net to take foreign matters, and meshes can be contracted to lock the foreign matters. Through the arrangement of the conveying catheter and the fetching net in the fetching part, foreign matters in the trachea can be conveniently and effectively captured, and through the special design of the fetching net and the cooperation of an endoscope, an annular sliding block, an auxiliary block, a silk thread and other components, the purpose of fine adjustment of the position of the conveying catheter in the auxiliary components such as an artificial airway component is achieved.

The invention relates to a cleaning, shearing, blowing and grabbing foreign matter removing method and system for a contact network, and the method comprises the steps: obtaining multi-modal data through an acquisition terminal, carrying out the cross-modal fusion of the multi-modal data, and generating three-dimensional environment representation data; extracting morphological features and texture features of the target foreign body, and generating joint features; matching a clearing strategy set according to the joint features; performing action sequence optimization on the clearing strategy set to obtain an optimized clearing strategy; constructing a digital twin system of the target contact network, and performing online optimization on the optimization strategy set to obtain a target clearing strategy; according to the cleaning, shearing, blowing and grabbing foreign matter removing method and system for the overhead line system, the problems that a traditional method is low in efficiency, poor in adaptability and high in safety risk are solved through multi-modal data fusion, feature extraction and strategy matching mechanisms in combination with a dynamic optimization algorithm and a digital twinborn system, and the method and system are suitable for large-scale popularization and application. The method has the advantages of improving the clearing efficiency, enhancing the adaptability, reducing the safety risk and realizing intelligent strategy selection.

The invention relates to an extractor, in particular to a foreign matter extractor for the digestive system department. The invention aims to provide the foreign body extractor for the gastroenterology department, which can prevent foreign bodies from injuring the digestive tract. A foreign matter extractor for the digestive system department comprises a handle, a flexible shaft, a round block, clamping jaws, a first elastic piece and the like, the left end of the handle is connected with the flexible shaft, the left end of the flexible shaft is connected with the round block, the three clamping jaws used for clamping foreign matter are rotatably connected to the left side of the round block in the circumferential direction at equal intervals, and the first elastic piece is connected between the clamping jaws and the round block. An output shaft of a motor can drive a rotating block to rotate anticlockwise, clamping jaws are pulled through a pull block to be closed, and a foreign matter is clamped; a telescopic rod of an electric push rod can drive a hose to move leftwards, so that the hose wraps the foreign matter, the hose pushes a sliding block to move leftwards, and a push wheel pushes the foreign matter rightwards, so that the foreign matter is completely located in the hose; the injury of foreign matters to the digestive tract of the patient is avoided.

The application discloses a kind of children emergency respiratory tract foreign matter quick removal device, it is related to respiratory tract foreign matter removal technical field, to solve the technical problem that existing negative pressure suction equipment negative pressure is too large, easy to directly absorb throat mucosa and cause damage, including the hose of adaptation and communication in negative pressure suction pipe input end, leakage connector, annular groove, removal mechanism, collection assembly and angle adjusting assembly.The engagement or non-engagement of transmission rod and conveying cylinder is switched, the rotation of the lower cone of the guide sealing module can be flexibly controlled to collect and the upper cone is sealed to separate two working states: when not engaging, the guide sealing module is in the form of a lower cone and leaves a gap to rotate, which can actively roll into the mucus of the throat, avoiding hard extrusion on the delicate throat;when engaging, the module moves up to the form of a sealed upper cone, which, combined with the path optimization of negative pressure separation and spiral groove, can prevent local negative pressure from being too high to cause discomfort in the throat of children, and can also avoid high-viscosity mucus fault, ensuring that the mucus is quickly and completely discharged.

The invention discloses an extra-high voltage eight-bundle conductor foreign matter removing robot, which relates to a high-voltage transmission line maintenance technology, is used for removing floating and hanging objects on an extra-high voltage eight-bundle conductor in an electrified manner, and adopts the technical scheme that the robot comprises a robot body, and a walking part, a mechanical arm part and a foreign matter storage bin which are mounted on the robot body; the walking part runs along a wire, and the mechanical arm part comprises a mechanical arm rotating shaft which is vertically arranged, a mechanical arm rotating motor which drives the mechanical arm rotating shaft to rotate horizontally, at least two mechanical arms which are connected with the mechanical arm rotating shaft, and foreign matter removing tools which are installed at the tail ends of the mechanical arms. The foreign matter removing tool is controlled by the mechanical arm rotating shaft and the mechanical arm to move, and the floating and hanging objects on the wire are taken down and put into the foreign matter storage bin.

Disclosed is a foreign body removal device, relating to the field of medical instruments. The foreign body removal device comprises a foreign body removal part (100), an adjustment part (200), and an operation part (500). One end of the foreign body removal part (100) is weaved and gathered to form a gathered part (120), the operation part (500) is fixedly connected to the tail end of the gathered part (120), the adjustment part (200) is annularly arranged on the outer side of the gathered part (120), and one end of the adjustment part (200) is fixedly connected to the operation part (500). The overall diameter of the foreign body removal device is extremely small, which is reduced by 50% or more compared with the overall diameter of a traditional stone removal basket product, and the foreign body removal device can be directly fed into a smaller cavity. The positions such as the biliary tract and the intestine can be easily reached, and meanwhile, the effective rotation of the foreign body removal part (100) can be ensured under various bends, thereby greatly expanding the application range of stone removal and foreign body treatment.

This utility model discloses a foreign object removal device for power transmission line inspection, including a mounting base plate, a fixing plate fixedly mounted at the bottom of the mounting base plate, a flamethrower fixedly mounted on the left side of the fixing plate, a flipping component mounted at the top of the mounting base plate, a connecting shell mounted on the top of the mounting base plate via the flipping component, a moving component mounted inside the connecting shell, a mounting plate mounted on the top of the connecting shell via the moving component, a driving component mounted inside the mounting plate, and a rotating component mounted on the rear side of the connecting shell. When moving to a node of the power transmission line, the driving component and the rotating component move away from the side of the power transmission line node, reset, and make contact with the power transmission line, allowing the device to be removed from the power transmission line node. This avoids the need to reposition the climbing robot if it cannot pass through the power transmission line node, thus reducing the time required for foreign object removal.

1. The name of the design product: animal laryngoscope. 2. The use of the design product: belongs to the field of animal medical devices, used in laryngoscopy, tracheal intubation, throat examination and foreign body removal in medical processes. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. Other circumstances that need to be explained: the state of the laryngoscope after installing the high-definition screen is shown as the use state reference figure.

To provide an imaging apparatus equipped with a panning or tilting mechanism, which easily performs a foreign matter removing operation.SOLUTION: An imaging apparatus includes a lens unit, an image sensor, an imaging unit including the lens unit and the image sensor, a pan or tilt mechanism configured to rotationally drive the imaging unit in a pan or tilt direction, and a foreign substance removal mechanism configured to remove a foreign substance on the image sensor.SELECTED DRAWING: Figure 3

The invention provides a power distribution overhead line foreign matter cleaning device, which comprises a cleaning mechanism and a walking mechanism, and is characterized in that the cleaning mechanism comprises a cleaning mounting rack, two groups of clamping arms symmetrically arranged on the cleaning mounting rack and a first driving mechanism for driving the clamping arms to open and close, and the inner sides of the clamping arms are respectively provided with a foreign matter cleaning piece; the walking mechanism comprises a walking mounting frame, walking wheels arranged on the walking mounting frame and a second driving mechanism for driving the walking wheels; at least two sets of symmetrical fixing arms are arranged on the side, close to the walking mounting frame, of the cleaning mounting frame, and rails, first sliding blocks in sliding fit with the rails and third driving mechanisms for driving the first sliding blocks to reciprocate along the rails are arranged on the positions, corresponding to the fixing arms, of the walking mounting frame. And the first sliding block is connected with the fixed arm through a hinged connecting rod. The foreign matter removing device for the power distribution overhead line has the advantages of scientific design, simplicity and convenience in operation and good foreign matter removing effect.

The invention relates to the technical field of nuclear power station equipment maintenance and foreign matter removal, and discloses a nuclear power station visual foreign matter grabbing device which comprises a driving chassis, a disassembly and assembly grabbing mechanism is arranged above the driving chassis, and visual moving mechanisms are jointly arranged above the driving chassis and on the two sides of the driving chassis; the dismounting grabbing mechanism comprises a rotating motor, the bottom face of the rotating motor is fixedly connected with the upper surface of the driving chassis, and the output end of the rotating motor is fixedly connected with a rotating disc. According to the visual foreign matter grabbing device for the nuclear power station, the horizontal angle and height of the grabbing device are conveniently adjusted by arranging the dismounting and mounting grabbing mechanism, a main body of the foreign matter grabbing device is conveniently dismounted and mounted by arranging the mounting and fixing plate on the lifting frame, and power supplies of the multi-dimensional extension mechanical arm and the electric mechanical clamping jaw are conveniently and manually controlled; and foreign matters in the nuclear power station are grabbed, so that the operation convenience of the device is improved, and the nuclear pollution to workers is reduced.

The invention relates to the field of line maintenance, in particular to a foreign matter removing device for power distribution line maintenance. The lifting frame is slidably mounted on the near-ground side of the rack through a plurality of guide rods; the follow-up enclasping module is arranged between the rack and the lifting frame and comprises an enclasping assembly used for enclasping the cable at the initial ascending section of the lifting frame and a triggering assembly used for triggering the enclasping assembly; the multi-point cutting module is arranged between the rack and the holding assembly, the multi-point cutting module comprises a butt joint assembly which is used for being arranged on the outer side of the cable in a butt joint and sleeving mode in the middle rising section of the lifting frame, and the butt joint assembly is provided with a rope cutting part and an air tap cutting assembly; the rope cutting part and the air tap cutting assembly are used for sequentially cutting the rope and the hydrogen balloon wound on the outer side of the cable at the ascending tail section of the lifting frame; according to the device, through the collaborative design of the follow-up holding module and the multi-point cutting module, the dual purposes of thorough removal of the rope and controllable recovery of the hydrogen balloon are achieved.

This invention relates to the field of wireless power transmission technology, specifically disclosing a foreign object removal device for a wireless charging area. Installed underground at the center of the wireless charging area, it is not easily damaged. The device includes a vertical telescopic and rotating mechanism, a removal worktable, and a foreign object removal control circuit. Left and right telescopic arms are located on the sides of the removal worktable. During foreign object removal, the vertical telescopic drive structure extends upwards to a preset height above the ground, and then the left and right telescopic arms extend to the left and right while the rotating drive structure rotates. This device has a simple structure; the left and right telescopic arms extend during use and retract when not in use. This allows for a compact integration of the device underground at the center of the wireless charging area. The corresponding transmitting coil at the center of the wireless charging area is also hollow; only the corresponding magnetic core and magnetic shielding plate need to be hollow, minimizing the impact on wireless power transmission efficiency. Furthermore, the rotating left and right telescopic arms ensure effective foreign object removal.

The invention relates to a foreign matter removing device and method for distribution line operation and inspection operation, a movable cleaning assembly is composed of a base and a top plate, an iron plate is arranged at the lower end of the base, a groove is formed in the upper surface of the base, and a plurality of driving wheels are arranged in the groove; the top plate is fixedly arranged above the base through a supporting plate, and the lower end of the top plate is connected with a limiting block through an electric push rod a; the sundry removing device is located on the right side of the base and composed of a supporting roller and installation supports arranged on the two sides of the supporting roller, a cleaning roller cutter is arranged outside the supporting roller, the side end of the supporting roller is externally connected with a rotating motor, the vibration deicing device is located above the sundry removing device and composed of a fixing plate and a pressing plate, and the fixing plate is fixedly arranged on the right side of a top plate. A middle plate is connected below the pressing plate through a vertical electric push rod c, a vibrator is arranged in the middle of the upper surface of the pressing plate, and elastic pieces connected with the fixing plate are arranged on the two sides of the upper surface of the pressing plate. The carrying unmanned aerial vehicle is located below the movable cleaning assembly. The device has the advantages of being reasonable in structural design and safe and efficient to use.

The invention relates to the technical field of power system line foreign matter removal, and discloses a power distribution network overhead line foreign matter removal device which comprises an insulation operating rod, a mounting frame is arranged on the insulation operating rod, and a cutting saw blade driven by a motor is arranged at the bottom of the mounting frame. A barrier removing plate movably connected with the mounting frame is arranged below the cutting saw blade; during working, the barrier removing plate is arranged on a cable and penetrates below a foreign matter along with movement of the insulating operating rod, the insulating operating rod is pulled downwards to drive the mounting frame to move downwards relative to the barrier removing plate, and the cutting saw blade makes contact with the foreign matter. When the motor is started, the cutting saw blade can cut and cut off the foreign matter wrapping the outside of the cable. The device is simple in structure, convenient to carry, safe to operate and controllable in cost, cables can be effectively prevented from being damaged, and operation safety is guaranteed.

A foreign matter removal device, a coolant system, and a machine tool system capable of efficiently removing foreign matter contained in a fluid are provided. [Solution] The foreign matter removal device comprises a storage tank to which a first fluid containing a liquid and foreign matter is supplied, causing the foreign matter to float to the surface of the liquid, an outlet through which a second fluid containing the foreign matter that has floated to the surface of the liquid flows out of the storage tank, a rotating body having an outer peripheral surface to which foreign matter moving from the outlet adheres, and a scraper that scrapes off the foreign matter adhered to the outer peripheral surface by rotating the rotating body.

A foreign matter removing apparatus according to an embodiment of the present application is for removing foreign matter on a surface of an electrode continuously conveyed in a conveying direction, and includes a blowing unit that blows air toward the surface of the electrode, a suction unit that sucks out the foreign matter separated from the surface of the electrode, and an extension unit that extends between the blowing unit and the suction unit, wherein the extension unit is formed with an adjustment unit that is concave in a direction away from the surface of the electrode.

To provide a tool cleaning device which is configured to remove foreign objects adhering to a surface of a cutting tool and enables improvement of maintainability for maintaining foreign object removal performance.SOLUTION: A tool cleaning device 1 cleans a cutting tool TL having a substantially circular shape and includes: a holding part 2 for holding the cutting tool TL; and a cleaning mechanism 3 for cleaning the cutting tool TL held by the holding part 2. The cleaning mechanism 3 has: a feeding part 32 which feeds a belt-like sheet 31 for wiping foreign objects adhering to a surface of the cutting tool TL; and a recovery part 33 for recovering the fed belt-like sheet 31.SELECTED DRAWING: Figure 4

The utility model is suitable for the technical field of wireless charging, and provides a foreign matter removal system, which comprises a first robot used for sending a removal control instruction to a second robot after driving to a target parking space according to a foreign matter removal instruction, the target parking space being a parking space which is currently providing a wireless charging function for a target vehicle, and the second robot being a parking space which is currently providing a wireless charging function for the target vehicle; the target parking space at least comprises a target area used for providing a wireless charging function, and the clearing control instruction carries coordinate information of the target area; and the second robot is arranged on the first robot, establishes communication connection with the first robot, and is used for receiving the clearing control instruction and clearing foreign matters in the target area. According to the foreign matter removing system, the first robot and the second robot cooperatively remove the foreign matter, the foreign matter removing means can be enriched on the basis of reducing the removing cost, and the foreign matter removing effect is improved.