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46 results about "Dental alveolus" patented technology

Dental alveoli (singular alveolus) are sockets in the jaws in which the roots of teeth are held in the alveolar process with the periodontal ligament. The lay term for dental alveoli is tooth sockets. A joint that connects the roots of the teeth and the alveolus is called gomphosis (plural gomphoses). Alveolar bone is the bone that surrounds the roots of the teeth forming bone sockets.

Individualized biomimetic dental implant and manufacture method thereof

InactiveCN106037965ALow elastic modulusImprove biomechanical compatibilityDental implants3d printCell adhesion
The invention relates to an individualized biomimetic dental implant and a manufacture method thereof. The invention is characterized in that the dental implant comprises an implant body for imitating the original tooth root tissue structure of a patient's missing tooth and also comprises a biomimetic artificial alveolar bone structure outer-layer for imitating a patient's alveolar bone tissue structure. The biomimetic artificial alveolar bone structure outer-layer and the external surface of the implant body are combined as a whole. The biomimetic tooth root implant body's outer layer is a 3D printed biomimetic artificial alveolar bone structure outer-layer which is combined with the implant body to form a whole structure, and is similar to the tissue structures of missing tooth's original tooth root and alveolar bone. Thus, the invention provides an ideal implementation scheme of a biomimetic artificial tooth root structure. What is the most important is that the invention provides a structure which is beneficial to bone marrow stem cell and osteogenesis-related cell adhesion, proliferation and mineralization and gives play to final osteogenic function and has good bioactivity. Therefore, a microenvironment for promoting osteogenesis is created, osteocyte generation is induced, and early rapid and firm synosteosis is realized.
Owner:STOMATOLOGICAL HOSPITAL TIANJIN MEDICAL UNIV

Cortical drilling

InactiveUS20130150857A1Sharp and rapid change in resistanceImprove the immunityDental implantsSurgeryDental alveolusTrabecular bone
A method is provided that includes advancing a drill having a distal end through an occlusal cortex into trabecular bone of an alveolar ridge, and ceasing the advancing of the drill when the distal end of the drill reaches an occlusal surface of a superior cortex of the alveolar ridge. Other embodiments are also described.
Owner:MAXILLENT

Personalized dental implant and manufacturing method thereof

The invention relates to a dental implant and belongs to the field of medicine. The personalized dental implant is characterized by comprising a tooth root and an abutment. The shape and size of the tooth root are matched with alveolar bone, and the porosity in the axial and circumferential directions of the tooth root changes in a gradient way, so that the elastic modulus of the tooth root is matched with the elastic modulus of the alveolar bone to eliminate a stress shielding effect, and the force transfer effect between the dental implant and the alveolar bone is relatively good; the surface of the tooth root is mineralized to promote the integration of the dental implant and bone; the abutment and a tooth root connection section are inwardly sunken to form a gingival recess filled with an adhesive to improve the stability of the dental implant. The invention also relates to a method for manufacturing the dental implant. The method is characterized in that the alveolar bone space configuration and the bone elastic modulus are obtained by a medical imaging technique; and then the three-dimensional shape and elastic modulus of the matched dental implant are derived reversely; after 3D printing integral molding, the dental implant of which the shape, size and elastic modulus are matched with those of the alveolar bone is prepared.
Owner:SHANGHAI RUIBO MEDICAL TECH CO LTD

Individual biomimetic dental implant and making method thereof

ActiveCN106333753AEarly rapid and strong osseointegrationFast and strong osseointegrationDental implantsCell adhesionBone structure
The invention relates to an individual biomimetic dental implant and a making method thereof, and the individual biomimetic dental implant includes an implant body imitating an original teeth root tissue structure of a missing tooth of a patient, a bionic artificial alveolar bone structure outer layer which is bonded with the outer surface of the implant body into one body, and biological protein molecule-bone morphogenetic protein (BMP) which is attached to the bionic artificial alveolar bone structure outer layer. The implant body and the bionic artificial alveolar bone structure outer layer are overall 3D-printed, and are similar to the original teeth root tissue structure and the alveolar bone tissue structure of the missing tooth of the patient, and the BMP-modified biological protein molecule promoting rapid bone formation is added, so that an ideal bionic artificial teeth root tissue structure is provided. The most important is to provide a good biological activity structure which is conducive to bone marrow stem cell and bone formation-related cell adhesion, proliferation and mineralization to finally play the osteogenic function, a bone formation promotion microenvironment is created, bone cell formation is induced, and early rapid and strong bone combination can be realized.
Owner:STOMATOLOGICAL HOSPITAL TIANJIN MEDICAL UNIV

Piezoelectric inducing implant denture

The invention discloses a piezoelectric inducing implant denture, which comprises a dental crown, an abutment and an implant, wherein the top surface of the dental crown is an occlusive thrust face for interlocking force. The piezoelectric inducing implant denture is characterized in that an alveolar nerve stimulating device is arranged in the dental crown; the interlocking force on the occlusive thrust face is converted into electric energy by the alveolar nerve stimulating device; and then current is released to simulate alveolar nerves. According to the piezoelectric inducing implant denture, mechanical energy that a patient excessively utilizes the denture is converted into electric energy; a discharge electrode is released to peripheral alveolar nerves to stimulate nervous centralis of a human brain and prompt the patients to timely take protective measures, so that parodontium neurotransmission is replaced; the targets of self-detection and protection of the denture are realized; and the blank in the field is filled up.
Owner:SHANGHAI EAST HOSPITAL

Asymmetric dental implant

The invention discloses an asymmetric dental implant matching with the jawbone section shape. The asymmetric dental implants can be divided into two groups: namely the single type and the multi type according to the number of the designed tooth root implant; two groups: namely the straight type and the bend type according to the need of the position where a dental implant is planted; two groups: namely the single tooth type and multi tooth type according to the number of the designed dental crown; and two groups: namely the coaxial type and the preset deflection angle type according to the including angel between the tooth root and the baseline of the tooth crown; the various types mentioned above can be combined with each other to form various combined types, the asymmetric dental implants are provided with various sizes, so the operator can choose the most suitable type and size of the asymmetric dental implants according to the dissection characteristics of the planted alveolar bone of the patients.
Owner:BEIJING AKEC MEDICAL

Throat medicine spraying device conveniently operated by one man

The invention discloses a throat medicine spraying device conveniently operated by one man. The throat medicine spraying device comprises a tooth socket, tooth grooves are formed in the upper surfaceand the lower surface of the tooth socket, a through groove is formed in the middle of the tooth socket, slide rods are embedded to the upper inner wall and the lower inner wall of the through groove,opposite abutting plates are fixedly connected to the slide rods, a universal ball is embedded between the abutting plates, and infusion pipes are communicated with the two sides of the universal ball; an atomizing nozzle is communicated with the portion, located at the tail end of the left side of the universal ball, of the infusion pipes. By means of the throat medicine spraying device conveniently operated by one man, and through the arrangement of the universal ball, the slide rods and a holding rod, with the tooth socket being the support, the position of the atomizing nozzle in the oralcavity is conveniently adjusted; through the arrangement of an inspectoscope, a front-surface mirror and lamp beads, a patient conveniently observes the wounded part by himself or herself, medicine is precisely applied, the dosage of the medicine is saved, and the stimulation and injury of the oral cavity are lowered.
Owner:陈鑫利

Reflected gingival tissue retractor device for surgical dental procedures, kit and method for use thereof

A gingival tissue retractor for retracting gingival tissue away from tooth and bone during a surgical procedure having an alveolar bone grip having an open frame structure positionable over at least one tooth and along a predetermined segment of an alveolar bone and providing an inward resilient force about opposite sides of the alveolar bone for maintaining position of the gingival retractor; a first gingival reflector having a solid plate structure and attached to a lower section of one side of the alveolar bone grip for providing a primarily downward force to gingival tissue on one side of the alveolar bone; and a second gingival reflector having a solid plate structure and attached to a lower section of another side of the alveolar bone grip for providing a primarily downward force to gingival tissue on another side of the alveolar bone.
Owner:WARSAW ORTHOPEDIC INC

Titanium mesh device with individualized bone ridge regeneration titanium mesh, for accurate implant tooth repairing operation and manufacturing method of titanium mesh device

The invention discloses a titanium mesh device with an individualized bone ridge regeneration titanium mesh, for an accurate implant tooth repairing operation. The titanium mesh device comprises the titanium mesh, an implant fossa guide hole and positioning sleeves, wherein the titanium mesh is connected with the guide hole; and the positioning sleeves extend in the direction from the titanium mesh to neighbor teeth. The invention also discloses a manufacturing method of the titanium mesh device with the individualized bone ridge regeneration titanium mesh, for an accurate implant tooth repairing operation. According to the titanium mesh device with an individualized bone ridge regeneration titanium mesh, for an accurate implant tooth repairing operation disclosed by the invention, parameters including external dimensions and the like, of the individualized shape titanium mesh are suitable for the requirements of different patients, the two positioning sleeves extending from the edge of the titanium mesh are used for being fixed with the neighbor teeth on two sides; the neighbor teeth on two sides are used as main fixing stress supporting points to perform fine adjustment on the shape of the titanium mesh, so that the situation that the titanium mesh is tightly jointed to an alveolar bone wall without relying on the experience of a clinician can be realized, and after the operation, the growth of the bone is effectively guaranteed.
Owner:6D DENTAL TECH

Dental implant assembly for uniform distribution of occlusal forces

ActiveUS9522053B2Reduce deleterious forceMaintain microvascularity and viable structural supportDental implantsBiomechanicsDental alveolus
A dental implant abutment assembly imitates a micro-motion mechanism to direct occlusal forces internally, and uniformly distribute the occlusal forces into the body of an ossoeintegrated dental implant. The micro-motion mechanism is configured to imitate the biomechanical behavior of the periodontal ligament through a compressive action that dampens vertical, horizontal, and angular forces. A compressive ring provides a dampening effect to supportive components of the assembly. A compressive coil redirects vertical forces along a longitudinal axis of the assembly. An implant body osseointegrates into the dental alveolus. A central mobile element seats in the dental body. The compressive coil extends along the central mobile element to absorb vertical forces. The compressive ring seats on the collar of the dental implant. A threaded cannulated housing securely holds the central mobile element and the compressive coil to form a single unit. A restorative abutment portion threadably seats on the central mobile element.
Owner:VUKAS STEVEN

Ball screw rod composite set

ActiveCN101063479AAvoid unscrewing drop casesAvoid crush damageGearingBall screwDental alveolus
The invention is a combination device of ball and screw, which is characterized in that the shoulder of the screw shaft is provided with barren teeth slot and the end of screw shaft is provided with a escaping-cut portion, wherein the escaping-cut portion is connected with a barren teeth end of the barren teeth slot to the finger of the end plug can move axially with the cap to screw into the barren teeth slot, and the invention can realize the assembly of the cap, avoids the ball screwing out and dropping off during the separation of the cap and the screw shaft or the cap is over-stroke and prevents the deflection and deformation in the operation to assure the using life of the ball and screw.
Owner:HIWIN TECH

Operation guide plate for preparing dental socket for autologous tooth transplantation and manufacturing method and application thereof

The invention relates to an operation guide plate for preparing a dental socket for autologous tooth transplantation and a manufacturing method and application thereof. The operation guide plate for preparing a dental socket for autologous tooth transplantation comprises an occlusal plate which is occluded on teeth, and a plurality of cylindrical channels which extend along the longitudinal direction and allow a ball drill to penetrate are arranged on the occlusal plate; and all the cylindrical channels are combined to form a shape that matches the root contour of the donor tooth. According to the invention, the position of the donor tooth is virtually designed through a computer, and the operation guide plate or an operation guide plate assembly is designed to guide the preparation of the host-site tooth socket. The operation guide plate not only has simple structure, but also can improve the preparation precision of the host-site dental socket, so that the guided and prepared dental socket has high matching degree; and in addition, the operation guide plate can effectively ensure that the donor tooth is matched and occluded with the host site.
Owner:福建医科大学附属口腔医院

Use method of dental suppository channel type attachment

ActiveCN112022394AKeep moreIn line with the concept of minimally invasiveImage enhancementGeometric image transformationDental alveolusFixed prosthodontic
The invention discloses a use method of a dental suppository channel type attachment. The use method comprises the following steps: determining position information of the suppository channel type attachment according to alveolar cavity information; acquiring shape information of a suppository channel, and performing conventional preparation on an abutment tooth in front of a tooth lacking gap; acquiring inclination information of an abutment tooth behind the tooth lacking gap, and performing conventional preparation on the abutment tooth behind the tooth lacking gap; preparing a tooth impression according to the alveolar cavity information, preparing a rear half part fixed false tooth according to the tooth impression, and placing a suppository body at a position close to the center of the alveolar cavity; manufacturing a front half part fixed false tooth according to the tooth impression; mounting the rear half part fixed false tooth in an alveolar cavity of a patient, and fixedly mounting the front half part fixed false tooth at one end, far away from the alveolar cavity, of the rear half part fixed false tooth by using an adhesive. The suppository body and abutment teeth on oneside are used for obtaining a common positioning channel, and teeth are ground as little as possible on the other side, so that the purpose of storing tooth tissue as possible is achieved.
Owner:北京联袂义齿技术有限公司

Method for automatically extracting feature points of digital model of preoperative nasal-alveolar process appliance

The invention discloses a method for automatically extracting feature points of a digital model of a preoperative nasal-alveolar process appliance. The method comprises the following steps: S1, acquiring an oral impression model file and preprocessing the oral impression model file; S2, performing coordinate system transformation on the preprocessed oral impression model; S3, performing segmentation processing on the oral impression model after coordinate system transformation; S4, performing two-dimensional plane projection on digital models of the alveolar bones on the two sides, and performing image fitting on the projected images of the alveolar bones on the two sides to obtain a fitting graph; and S5, performing side plane projection on the alveolar bones of the healthy side and the affected side according to the fitting graph, segmenting a ridge line according to the side plane projection, and extracting feature point coordinates according to the trend of the ridge line. Dimension reduction processing is performed on three-dimensional digital model data, and feature points are extracted by using image fitting and feature recognition technologies; the method can provide guidance for the design of a preoperative cleft lip and palate correction model, reduces the operation risk, improves the correction success rate, and has good commercial prospect and values.
Owner:WUHAN UNIV

Novel dental impression tray for fine oral impression production

InactiveCN111214303AEasy to take modulusSolve the problem that the trouble of taking models affects work efficiencyImpression capsGonial angleImpression trays
The invention discloses a novel dental impression tray for fine oral impression production, and relates to the technical field of medical appliances. The tray includes a right supporting plate and a left supporting plate, a through hole is arranged in one side of the right supporting plate, a fixing groove is arranged in one side of the left supporting plate, a pin shaft is movably connected in the fixing groove, and the middle part of the pin shaft is movably connected with the inner wall of the through hole; and the top ends of the right supporting plate and the left supporting plate are fixedly connected with a tooth socket, a nano air cushion is fixedly connected in the tooth socket, and an air filling hole is arranged in the surface of the tooth socket. According to the tray, throughcooperation of the nano air cushion and the air filling hole, molding can be conveniently performed on patients with high arch of palatal caps and uneven dentition, the problem that work efficiency isaffected because molding is trouble is solved, and the work efficiency is improved; and through cooperation of clamping grooves, a spring, a fixing rod, a sliding groove and blocking blocks, the angle of the tooth socket can be adjusted, so that the problem of replacing the tooth socket back and forth is solved, and the work efficiency is improved.
Owner:长兴义捷电子器材有限公司

Light-emitting oral implant

InactiveCN110236711AOne-piece structure is stable and firmStrong expansionDental implantsLight therapyMedicineDental alveolus
The invention discloses a light-emitting oral implant. The light-emitting oral implant comprises an implant main body, wherein the implant main body adopts an integrated structure, and comprises an upper part and a lower part; the lower part is cylindrical; threads are formed in the surface of the lower part; the joint of the upper part and the lower part adopts a step structure of which the upper part is thin and the lower part is thick; an annular protrusion is arranged on the upper part surface; a cavity is formed in the implant main body; an opening which is connected with the cavity is formed in the top end of the implant main body; internal threads are formed in the opening, and a jack screw is mounted in the opening; and at least four bar-shaped through holes which communicate with the inner cavity are formed in the threaded surface outside the lower part. The light-emitting oral implant provided by the invention is implanted in an alveolar socket in an oral cavity through the threads, and the threads have high swelling force, so that the light-emitting oral implant can be fixed after being implanted; the circular structure at the bottom is adopted, so that the tissue at the bottom of the oral cavity can be protected; a disinfected light source is encapsulated in the cavity through the jack screw, and the disinfection light is projected from the through holes to disinfect gum surrounding the implant; and the implant main body adopts an integrated structure, so that the implant main body is stabler and firmer.
Owner:STOMATOLOGICAL HOSPITAL OF CHONGQING MEDICAL UNIV

Automatic rapid helical tooth shape abutting structure of foundation pile

ActiveCN104674835ARealization of automatic fast spiral tooth-shaped butt jointRealize dockingBulkheads/pilesDental alveolusEngineering
The invention relates to an automatic rapid helical tooth shape abutting structure of a foundation pile. An external-thread circular truncated cone which protrudes to extend and is provided with bulged threads is axially arranged on the lower end of an upper to-be-abutted foundation pile, spaced frustum teeth and frustum tooth sockets of which the screwing direction is coincident with that of threads on the external-thread circular truncated cone are uniformly distributed around the upper end of the external-thread circular truncated cone, an internal-thread circular truncated cone groove which is matched and coincides with the external-thread circular truncated cone is axially formed in the upper end of a lower to-be-abutted foundation pile, conical wall tooth sockets which are in tooth shape abutting with the frustum teeth are uniformly distributed around the upper end of the internal-thread circular truncated cone groove, and the conical wall tooth sockets and conical wall teeth are staggered at intervals; during abutting, quick-drying high-strength cement slurry is applied to the outer parts of the external-thread circular truncated cone and the frustum teeth and the inner parts of the internal-thread circular truncated cone groove and the conical wall tooth sockets. The automatic rapid helical tooth shape abutting structure of the foundation pile has the advantages of simple structure, low cost, time saving, labor saving, stability and reliability, and the automatic rapid helical tooth shape abutting of the foundation pile can be realized.
Owner:江苏山海新型建材股份有限公司

Self-tapping dental implant

The invention belongs to the technical field of dental implants and in particular relates to a self-tapping dental implant. The self-tapping dental implant comprises a body, wherein a screw-in end anda crown end used for connecting with the dental implant are respectively arranged at two ends of the body; and a double-headed screw thread starting from the body and ending at an mouth edge of the crown end is arranged on an outer side face of the crown end. The self-tapping dental implant disclosed by the invention has the beneficial effects that friction force formed by screwing the double-headed screw thread and a ridge crest is weak, and the dental implant is conveniently self-tapped; destruction of bones on the ridge crest is the minimal in the implanting process, the stress is low, thedistribution is uniform, and local stress concentration is avoided; an area attachment area is enlarged, the bone bonding strength of the implant is easily improved, and the later stress level is low; under external load and constraint conditions, stress and strain stressed by cortical bones are decreased, local stress concentration is difficult to cause, and the teeth are very strong; and when being screwed into the ridge crest, the self-tapping dental implant is low in resistance, excellent in self-tapping property, capable of containing alveolar bones at a high quantity and high in stability.
Owner:JIANGSU TRAUSIM MEDICAL INSTR

Simple adjustable bench clamp

PendingCN113319752AAchieve lockingAdjustable height direction force pointVicesStress pointClassical mechanics
The invention discloses a simple adjustable bench clamp. The simple adjustable bench clamp comprises a base, wherein a sliding groove is formed in the side wall of the base, a movable backup plate is slidably connected to the inner wall of the sliding groove, a fixed backup plate is fixed to the upper end of the base, positioning clamping mechanisms are arranged on the side wall of the movable backup plate and the side wall of the fixed backup plate, and tooth grooves are formed in the upper end of the base; and the upper ends of the tooth grooves abut against a supporting tooth block, an adjusting support is fixed to the upper end of the supporting tooth block, the side wall of the adjusting support is connected with a propelling screw in a penetrating and threaded manner, and the end of the propelling screw is connected with a propelling combination mechanism. The simple adjustable bench clamp has the advantages that clamping plates are locked through mounting bolts of the clamping plates, and the bolts for mounting the clamping plates penetrate through positioning kidney-shaped holes, so that the clamping plates can adapt to any position of the clamping plates in the range of the positioning kidney-shaped holes, mounting and position adjustment of the clamping plates cannot conflict, and meanwhile, a stress point in the height direction of a workpiece can be adjusted, and the workpiece can be clamped more stably.
Owner:霍山嘉远智能制造有限公司

Personalized customized invisible orthodontic appliance for III type malocclusion

The invention discloses an invisible appliance for III type malocclusion. The appliance is provided with energy storage components, an appliance body is made from a polymer material, and traction hooks or lingual side buckles are attached to the lingual sides of C6 and D6 and labial sides and lingual sides of C4 and D4 of the corresponding tooth positions on the appliance; each pair of the traction hooks or lingual side buckles between the lingual sides of C4 and C6 and between the lingual sides of D4 and D6 are sleeved with rubber bands, spring wires, stainless steel wires, titanium-nickel alloy and other energy storage components, and the positions between the traction hooks or lingual side buckles at the labial sides of C4 and D4 and biological anchorage nails knocked in the mandibularalveolar bone of the corresponding same side are also sleeved with congeneric energy storage components. When the whole pushback force is formed to the underjaw, the whole anchorage of the teeth is ensured, and front tooth lip leaning or tooth rotation cannot be caused. The appliance adopts a 3D technology, is combined with digital orthodontic software, solves the problems of bite, malocclusion and crowded dentition by fixing the rubber bands, the spring wires, the stainless steel wires, the titanium-nickel alloy and the other energy storage components on the traction hooks or lingual side buckles bonded or integrally formed on the invisible appliance, achieves the correction purpose of quickly moving teeth, can greatly shorten the correction cycle, can also avoid a jaw opening surgery, and greatly reduce wounds.
Owner:西安博恩生物科技有限公司

Dental calculus removing device for pet dog

The invention discloses a dental calculus removing device for a pet dog. The dental calculus removing device comprises a V-shaped tooth socket, wherein tooth grooves are formed in the upper and lowersurfaces of the V-shaped tooth socket; V-shaped cavities are formed in opposite inner walls of the tooth grooves; a plurality of triangular air cushions are embedded into the opposite inner walls of the tooth grooves at equal intervals; the triangular air cushions are in elastic sealing connection with the inner walls of the tooth grooves; one side of each triangular air cushion is parallel to theinner wall of the corresponding tooth groove; the tip end of each triangular air cushion extends into the corresponding V-shaped cavity; a V-shaped liquid storage bag and a V-shaped air storage bag are arranged between the inner bottoms of the upper and lower tooth grooves; a layer of hairbrush is arranged on the outer side wall of each triangular air cushion; the outer wall of each triangular air cushion communicates with a plurality of liquid outlet pipes and liquid suction pipes; check valves are mounted in the liquid outlet pipes and the liquid suction pipes; and the tail ends of the liquid suction pipes communicate with the V-shaped liquid storage bag. The dental calculus removing device for the pet dog is reasonable in structure and can be directly arranged on teeth in a sleeving manner to wrap the whole teeth, so that an all-directional and rapid cleaning process is realized.
Owner:扬州金霞塑胶有限公司

Dental device for the treatment of dental alveoli, method for manufacturing same and kit

A dental device for the treatment of dental alveoli, comprising a suction element; and a dental impression of a patient which defines at least one sealing surface configured to seal an alveolus of said patient. The sealing surface has a suction hole connected to the suction element in order to create a vacuum in the alveolus. Method for manufacturing a dental device for the treatment of dental alveoli and a kit associated with it.
Owner:LLOVERA MUNTANOLA JOSE MANUEL +1

Automatic and fast spiral tooth-shaped butt joint structure of foundation piles

ActiveCN104674835BRealization of automatic fast spiral tooth-shaped butt jointRealize dockingBulkheads/pilesButt jointDental alveolus
An automatic fast spiral tooth-shaped butt joint structure for foundation piles. At the end of the lower end of the foundation pile to be connected on the upper part, there is an externally threaded conical truncated protruding and extending axially, and the upper end of the externally threaded conical truncated is uniformly distributed with threads Conical frustum teeth and frustum tooth sockets at intervals with consistent rotation direction, at the end of the upper end of the pile to be connected to the lower part, there is an internal thread conical groove that matches the external thread conical frustum axially, and the internal thread conical frustum Around the upper end of the groove, there are evenly distributed conical wall alveolar butt joints with the teeth of the frustum of the cone, and the interval between the alveolar of the conical wall and the teeth of the conical wall is staggered; The interior of the platform groove and the tapered alveolar are coated with quick-drying high-strength cement slurry. The automatic fast spiral tooth form butt joint structure of foundation piles is simple in structure, low in cost, saves time and trouble, is stable and reliable, and can realize automatic rapid spiral tooth form butt joint of foundation piles.
Owner:江苏山海新型建材有限公司
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