53results about How to "Efficient and stable transportation" patented technology

There is provided a feed conveying apparatus in which the occurrence of a trouble due to a looseness of a disk cable is certainly prevented and feed is efficiently and stably conveyed into a feed conveying path by the disk cable without being left in the path.A cable driving unit has a looseness eliminating member for guiding the feeding direction of the disk cable and eliminating the looseness at a feeding start position where the disk cable is fed out from a tooth portion of the outer circumference of the driving wheel toward the downstream side in the tangential direction. The feed conveying path formed by a pipe or the like is equipped with a cable pressing metal fitting for guiding the disk cable along a bottom surface portion in the feed conveying path while suppressing the floating of the disk cable running in the feed conveying path from an upper position.

A hair dryer with a static atomizing device is provided, which has the capability of generating an electrostatically charged microparticle mist of 3 nm to 100 nm. The static atomizing device has a pair of an atomizing electrode and a counter electrode, a tank for storing a liquid such as water; a liquid transport member for transport water from the tank to the atomizing electrode according to capillary phenomenon, and a voltage applying unit. When a high voltage is applied between the atomizing electrode and the counter electrode, while water being supplied to the atomizing electrode through the liquid transport member, the electrostatically charged microparticle mist is generated.

The invention discloses a monitoring treatment device for riverway construction fracture surface bottom mud and a construction method of the monitoring treatment device. The monitoring treatment device comprises bottom mud monitoring boxes, a bottom mud treatment pond and a bottom mud recycling pond; the bottom mud treatment pond is connected with the bottom mud recycling pond through a sludge output pipe which is provided with a mud pumping pump; a water inlet pipe is arranged on the top face of the bottom mud treatment pond and is communicated into water of a riverway; a stirring mechanism is arranged in the bottom mud treatment pond; the bottom mud monitoring boxes are connected with the bottom mud treatment pond through conveying pipes; and every two adjacent bottom mud monitoring boxes are connected through the corresponding conveying pipe. The construction method of the monitoring treatment device includes staking out in survey, foundation pit excavation, bottom mud treatment pond construction, bottom mud recycling pond construction, bottom mud monitoring box arrangement and bottom mud monitoring pilot running. The monitoring treatment device is simple in structure and remarkable in effect of riverway construction fracture surface bottom mud monitoring and clearing, the riverway construction fracture surface strength is improved, the bottom mud high in pollutant content can be conveniently treated, and secondary pollution formed by release of pollutants in bottom mud is prevented.

A hair dryer having a static atomizing device, which has the capability of generating an electrostatically charged microparticle mist of 3 nm to 100 nm. The static atomizing device has a pair of an atomizing electrode and a counter electrode, a tank for storing a liquid such as water; a liquid transport member for transport water from the tank to the atomizing electrode according to capillary phenomenon, and a voltage applying unit. When a high voltage is applied between the atomizing electrode and the counter electrode, while water being supplied to the atomizing electrode through the liquid transport member, the electrostatically charged microparticle mist is generated.

An LNG storage container carrier includes: one or more cargo holds provided on a hull such that upper portions thereof are opened; a plurality of first and second upper supports installed on the cargo holds in a width direction and a length direction to partition the upper portions of the cargo holds into a plurality of openings, wherein storage containers are vertically inserted into the openings and supported; and a lower support installed under the cargo holds and supporting the bottoms of the storage containers inserted into the openings. Accordingly, it is possible to efficiently and stably transport the storage containers storing LNG or PLNG pressurized at a predetermined pressure. Such storage containers may be transported through simple modification of the existing container carrier.

The invention discloses a universal type plate placing machine. The universal type plate placing machine comprises a machine frame, a drive mechanism and a conveying turnover mechanism, wherein the drive mechanism and the conveying turnover mechanism are fixed on the machine frame. The conveying turnover mechanism comprises two driven rollers and a drive roller which are fixed on the machine frame, a conveying belt which are connected with the driven roller and the drive roller, and a turnover clamping plate which are detachably connected with the conveying belt. The drive roller is located between the two driven rollers, and a first motor is connected to one end of the drive roller. A plurality of clamping blocks are arranged on the peripheral surface of the conveying belt, and the lengthdirection of the clamping blocks is parallel to the width direction of the conveying belt. Clamping grooves connected with the clamping blocks in a clamping mode are formed in the lower end of the turnover clamping plate, anti-skid structures are arranged on the left and right side walls of the turnover clamping plate separately, and the anti-skid structures are formed by connecting a plurality of anti-skid protruded strips in sequence. The universal type plate placing machine can realize efficient and stable conveying of PCB with different thickness and perform 180 degrees turnover, and canfurther avoid the scratch of PCB surface.

The invention discloses a sample application system, which comprises a glass slide storage unit, a sample application unit and a transfer unit, wherein the glass slide storage unit is used for storing a glass slide; the sample application unit comprises a sample application platform used for placing the glass slide and a sample applicator used for carrying out sample application on the glass slide placed on the sample application platform; the transfer unit comprises a transition device and a transfer device; the transition device comprises two transition platforms which are located in a first transition area and a second transition area respectively; the transfer device comprises a first transfer device and a second transfer device; the first transfer device grabs the glass slide and transfers the glass slide between the glass slide storage unit and one of the two transition platforms; the second transfer device grabs the glass slide and transfers the glass slide between the sample application unit and the other of the two transition platforms; the two transition platforms are linked; when one of the two transition platforms is moved from the first transition area to the second transition area, the other of the two transition platforms is moved from the second transition area to the first transition area.

The invention provides mesenchymal stem cell membrane camouflaged magnetic drug-loaded nanoparticles as well as a preparation method and application thereof. The drug-loaded nanoparticles comprise drug-loaded Fe3O4 nanoparticles and a mesenchymal stem cell membrane compounded on the surfaces of the drug-loaded Fe3O4 nanoparticles, wherein the mass ratio of a drug to Fe3O4 nanoparticles in the drug-loaded Fe3O4 nanoparticles is 1:(4.5-5.5); the drug is selected from drugs capable of promoting cartilage differentiation and repair; and the ratio of the mass of the drug-loaded Fe3O4 nanoparticlesto the number of cell sources of the mesenchymal stem cell membrane is (3.4-3.9) mg: 5x10<6>. According to the drug-loaded nanoparticles, the mesenchymal stem cell membrane is taken as a carrier, andthe Fe3O4 nanoparticles loaded with the drug capable of promoting cartilage differentiation and repair are enveloped, so that the drug can be stably and efficiently transported to a diseased region, and the repair of cartilage tissues can be promoted. The mesenchymal stem cell membrane camouflaged magnetic drug-loaded nanoparticles are non-toxic, degradable and good in biocompatibility; and the effect of promoting cartilage repair is superior to that of pure local medication.

The invention relates to the technical field of biomedical devices and particularly discloses full-automatic ultrasonic welding equipment for serological pipettes. The full-automatic ultrasonic welding equipment for serological pipettes comprises a rack (1), a controller (2) and a conveying mechanism (3); the rack is sequentially provided with a first feeding mechanism (4), a first ultrasonic welding assembly (5), a second grabbing mechanism (6), a second ultrasonic welding assembly (7), a first grabbing mechanism (8), a drive mechanism (9) and a collection hopper (10) in the conveying direction of the conveying mechanism; and the rack is provided with a second feeding mechanism (11), a third feeding mechanism (12) and a lifting mechanism (13). The full-automatic ultrasonic welding equipment for serological pipettes has the characteristics of being high in automation degree, good in welding airtightness, high in production efficiency, low in production cost and the like.

The invention relates to the technical field of hygiene product manufacturing equipment, and discloses a feeding system for box-type hygiene product raw materials. The feeding system comprises a frame-shaped rack, a pressing roller device, a lifting drive device and a control device. Lifting rails are arranged at the front side and the rear side of the frame-shaped rack. The pressing roller device is arranged on the lifting rails. The box-type hygiene product raw materials are placed inside the rack and located below the pressing roller device. The lifting drive device is arranged on the frame-shaped rack and drives the pressing roller device to be lifted up and down. The box-type hygiene product raw materials penetrate through the pressing roller device and are conveyed forwards through driving rollers. By the adoption of the feeding system, tension change of the raw materials in the breadth direction is overcome, the material breadth is controlled by means of guiding in the feeding process, deviation can be avoided, and the materials can be conveyed to the downstream working procedures stably and efficiently. Non-stop material receiving is achieved, the material receiving success rate can reach 100%, and the utilization rate of the raw materials can reach 99% or above.

The invention discloses a conveying device used for conveying a screw rod. The conveying device used for conveying the screw rod comprises a base and a supporting board. Balls are arranged between the base and the supporting board. The cross section structures of the base and the supporting board are of a same structure which is shaped like a Chinese character 'shan'. The supporting board is overlapped in grooves of the base which is shaped like the Chinese character 'shan'. The two ends of the supporting board are provided with multiple V-shaped supports. The left side of the base is provided with a pair of spring seats. A long pressing board is arranged above the pair of spring seats. The two ends of the long pressing board are each provided with a curved bar. The curved bars are movably connected with the V-shaped supports. In this way, ordered arrangement can be achieved, the product machining efficiency is high, and the quality is stable.

The invention discloses an air-suction type seeder for small and medium-sized seeds, and belongs to the technical field of agricultural machinery. The air-suction type seeder for small and medium-sized seeds comprises a seed box, a seed metering disc, a negative pressure air chamber outer shell and a seed metering tube, wherein the negative pressure air chamber outer shell is fixedly mounted on amachine frame of the seeder; an air chamber is formed in the negative pressure air chamber outer shell; a negative pressure air passage is formed in the top of the negative pressure air chamber outershell; the seed metering disc capable of rotating relatively is arranged at the bottom of the negative pressure air chamber outer shell; the seed metering disc is driven to rotate by a motor; seed suction air passages are uniformly formed in the seed metering disc in an annular array; seed suction air nozzles are mounted at the bottom ends of the seed suction air passages; the seed box and the seed metering tube are respectively and fixedly mounted on two sides of the seed metering disc; a seed filling slideway is formed in an outlet at the bottom of the seed box; and an air flow blocking piece is mounted on the side wall of the air chamber. The seeder utilizes a negative pressure seed suction mode to carry out seed delivery, the delivery is stable and efficient, and the phenomena of seeddamage and missed sowing and resowing are effectively reduced, and thus the seed metering efficiency of the seeder is guaranteed.

The invention relates to a deep-well rescuing device. The deep-well rescuing device comprises a control device, a mechanical arm, a lifting device, a well mouth adjusting device and a communication antenna. The control device is connected with the mechanical arm, the lifting device, the well mouth adjusting device and the communication antenna. The control device is used for displaying the real-time situation in a well and giving an instruction for a processing manner implemented for the real-time situation in the well. The mechanical arm is used for detecting the real-time situation in the well and processing the real-time situation in the well according to the instruction given by the control device. The lifting device is used for transporting objects in the well. The well mouth adjusting device is used for adjusting the state that the lifting device can smoothly run. The communication antenna is used for receiving real-time situation information in the well and transmitting the information to the control device. According to the deep-well rescuing device, the problems that in a traditional deep-well rescuing manner, a large machine and a large device are applied to large-area construction, the best rescuing time is missed, and secondary injuries are possibly caused to a trapped person are solved.

The invention discloses a skid elevator for tobacco conveying. The skid elevator comprises a lifting driving mechanism, a lifting power transmission system, a lifting platform guide mechanism, an adjustable self-locking mechanism, a roller bed and a skid; and the lifting driving mechanism consists of a lifting motor, a speed reducer, a coupler, a belt seat supporting bearing, a transmission shaft, a lifting synchronous belt roller and a lifting driving mechanism bottom plate. One side of the lifting motor is provided with the speed reducer, the speed reducer is connected with the transmission shaft through the coupler, the transmission shaft is fixedly connected with the lifting driving mechanism bottom plate through the belt seat supporting bearing support, one side of the transmission shaft is fixedly connected with the lifting synchronous belt roller in the circumferential direction, and an escalator rail is arranged on the lifting driving mechanism bottom plate. According to the skid elevator for tobacco conveying, the vertical lifting conveying mode is adopted, stable and efficient conveying of the cargos with relatively large height difference in the tobacco material conveying process is realized, and the conveying distance and equipment size of a traditional conveying line are effectively reduced.

The invention promotes a smooth agitation and efficient transport of coins by setting the rotation direction of the agitator in the same direction as the rotary disc to move a center of rotation of the agitator to a location where most coins are collected.

The invention discloses a fire extinguisher machining and transporting device which comprises a supporting bottom plate, a fixed transporting mechanism is arranged at the upper end of the supporting bottom plate, the fixed transporting mechanism comprises a fixed main plate, a plurality of first through holes are symmetrically formed in the fixed main plate, and second through holes allowing limiting rods to penetrate through are formed in a fixed ring; the device further comprises a plurality of fixing threaded pins, the multiple fixing threaded pins penetrate through the fixing ring and arein threaded connection with the fixing ring, the other ends of the fixing threaded pins are connected with an abutting plate, the inner side of the abutting plate is connected with a first abutting pad, and the upper end of the fixing ring is connected with two symmetrically-arranged adjusting rods. An adjusting handle is arranged at the upper end of the adjusting rod, a plurality of adjusting holes are evenly distributed in the adjusting rod, the adjusting rod comprises a plurality of adjusting plug pins corresponding to the adjusting rods in a one-to-one mode, a plurality of abutting bent plates are arranged in the groove, the abutting bent plates are connected with the groove through first elastic pieces, and second abutting pads are arranged on the inner sides of the abutting bent plates.

The invention relates to the technical field of biological medical instruments and particularly discloses a full-automatic leakage checking and dust removing integrated equipment for a serum transferpipette. The full-automatic leakage checking and dust removing integrated equipment for the serum transfer pipette comprises a conveying device, a leakage checking device, a removing device, a dust removing device, a charging device and a shifting device. The conveying device comprises a conveying chain and a positioning wheel disk, and the positioning wheel disk is provided with an arc positioning groove. The leakage checking device comprises a first lifting air cylinder, a first pushing air cylinder and a second pushing air cylinder. The removing device comprises a second lifting air cylinder and a third pushing air cylinder, the surface of the lower part of an L-shaped pushing block is of a wavy structure, and the side part of the L-shaped pushing block is provided with a semisphericalprotrusion. The dust removing device comprises a third lifting air cylinder and a fourth pushing air cylinder. The charging device comprises a feeding slide way and a discharging slide way. The shifting device comprises a saw tooth part and an adjusting block. The full-automatic leakage checking and dust removing integrated equipment for the serum transfer pipette has the beneficial effects that the detection consumed time is relatively short, unqualified products can be directly screened out, fine particular dust and impurities can be removed, the automation degree is relatively high, charging is tidy, a material opening cannot be blocked, and the adaptation is relatively good.

The invention discloses a gas turbine waste heat boiler flue gas denitration utilization device, and relates to the field of flue gas denitration, the gas turbine waste heat boiler flue gas denitration utilization device comprises a heat exchanger, a urea hydrolysis device and a denitration reactor, a gas inlet of the heat exchanger is connected with a flue gas inlet pipe, and an output port of the heat exchanger is connected with a pressure reduction and temperature reduction flue gas pipe; a pneumatic control valve is arranged at the other end of the pressure and temperature reduction flue gas pipe, the output end of the pneumatic control valve is connected with a dilution air pipeline, the other end of the dilution air pipeline is connected with the ammonia gas input end of the denitration reactor, and a heat tracing pipeline is fixedly installed on the side face of the denitration reactor; the heat tracing pipeline is located on the outer side of the dilution air pipeline. The flue gas of the unit is directly extracted, so that the laying and operation cost of a high-temperature fan and a steam heat exchanger can be saved, the transportation condition of an ammonia gas mixture after hydrolysis is met, the operation cost is effectively reduced, and efficient and stable denitration work is ensured.

The invention discloses an ore conveying device, which includes a frame and a conveyor belt. A first support frame is installed at one end of the frame, and a second support frame is fixed on the side of the frame opposite to the first support frame. A drive roller is installed at the inner middle position of the first support frame, a rotating roller is installed at the inner middle position of the second support frame, a fixed frame is connected to the bottom end of the frame, and the interior of the fixed frame is equidistant Five support links are installed, and a guide roller is installed at the middle position of one of the support links. The present invention provides hidden compartments and limit bars, which improves the stability and high efficiency of device transportation and avoids ore The conveyor belt of the conveying device is smooth, so the ore cannot be transported smoothly, and the efficient conveying of the conveying device cannot be guaranteed. A drawer-type activated carbon filter is installed to realize air filtration, improve the heat dissipation performance of the drive motor, and extend the service life of the drive motor.

The invention discloses an Internet of Things function detection device for Internet of Things household appliances. The Internet of Things function detection device for Internet of Things household appliances comprises a mounting frame, a control module is arranged in the mounting frame, a display module is fixedly mounted at the top of the front surface of the mounting frame, and the display module comprises two symmetrically distributed side plates. A sealing plate distributed in the horizontal direction is fixedly connected between the tops of the two side plates, a turning cover is rotatably connected to the top between the two side plates, a lighting panel is fixedly arranged on the rear side between the two side plates, and an electric panel is movably arranged above the lighting panel through a sliding table. The invention relates to the technical field of detection equipment. According to the Internet of Things function detection device for the Internet of Things household appliances, the control module is arranged, lifting of the electrical panel can be achieved through the sliding table, and when the Internet of Things function detection device is not used, the electrical panel can be lifted to the position behind the display module, so that misoperation of children is avoided, and potential safety hazards are reduced.

The invention relates to the technical field of biomedical instruments and particularly discloses a serum transfer pipette conveying mechanism. The serum transfer pipette conveying mechanism comprisesa rack, a conveying mechanism and a driving mechanism; the conveying mechanism comprises a driving shaft and a driven shaft which are rotationally arranged on the rack through bearings; the driving shaft and the driven shaft are each provided with two chain wheels; the chain wheels on the driving shaft and the driven shaft correspond to each other; the two groups of corresponding chain wheels areeach provided with a chain; the side part of each chain is provided with a plurality of M-shaped shelving parts; the M-shaped shelving parts on the two chains correspond to each other; the driving mechanism comprises a ratchet wheel and a driving cylinder; the driving cylinder is arranged on the rack; the end part of a piston rod of the driving cylinder is connected with a driving rod through a rotating part; the end part of the driving rod is arranged on the driving shaft through a bearing; a driving part is arranged on the driving rod; the ratchet wheel is arranged on the driving shaft; andthe driving part is connected with the ratchet wheel. The serum transfer pipette conveying mechanism provided by the invention has the characteristics of relatively high automation degree, relativelyhigh production efficiency and relatively low production cost.

The invention discloses a mountain track transportation device for loading and unloading goods, which comprises a guide rail frame, a guide rail platform, a driving platform, a sliding material rack and a material box, the sliding material rack is an annular bracket with a gap at the bottom, and the sliding material rack covers Set on the outer ring of the guide rail table, the sliding material rack and the driving table are rolled and supported on the top surface of the guide rail table through the sliding support device, the rear panel of the driving table is fixedly connected with the front panel of the sliding material rack, and the outer surface of the sliding material rack There is a ring-shaped material rack chute on the top, and the material rack slider is slid in the material rack chute. The material rack slider fixes the material box through the connecting device. The outer surface of the sliding material rack is provided with a plurality of materials through the connecting device. The present invention changes the traditional fixed shelf into a sliding material rack with the function of sliding height adjustment, which greatly facilitates the up and down handling of goods, saves time and effort, is fast and efficient, and the set gear drive mechanism can drive the sliding material smoothly and efficiently. Racks and bins are transported on rail tables.

The invention discloses a clamping and conveying device. The clamping and conveying device comprises a support, a chain type conveying mechanism, a clamping mechanism and a chain wheel tensioning mechanism. The chain type conveying mechanism comprises an upper clamping transmission chain assembly and a lower clamping transmission chain assembly; and each of an upper clamping transmission chain and a lower clamping transmission chain comprises a first chain, a second chain and a clamping chain which is arranged between the first chain and the second chain, connected to the first chain and the second chain and used for clamping a rope body, and the upper clamping transmission chain and the lower clamping transmission chain are arranged up and down; and the clamping mechanism can drive the upper clamping transmission chain and the lower clamping transmission chain to clamp the rope body located between the upper clamping transmission chain and the lower clamping transmission chain, and the chain wheel tensioning mechanism can tension the upper clamping transmission chain and the lower clamping transmission chain. According to the clamping and conveying device, the rope body such as a steel wire rope can be efficiently and stably conveyed.

The invention relates to the technical field of biomedical devices and particularly discloses full-automatic ultrasonic welding equipment for serological pipettes. The full-automatic ultrasonic welding equipment for serological pipettes comprises a rack (1), a controller (2) and a conveying mechanism (3); the rack is sequentially provided with a first feeding mechanism (4), a first ultrasonic welding assembly (5), a second grabbing mechanism (6), a second ultrasonic welding assembly (7), a first grabbing mechanism (8), a drive mechanism (9) and a collection hopper (10) in the conveying direction of the conveying mechanism; and the rack is provided with a second feeding mechanism (11), a third feeding mechanism (12) and a lifting mechanism (13). The full-automatic ultrasonic welding equipment for serological pipettes has the characteristics of being high in automation degree, good in welding airtightness, high in production efficiency, low in production cost and the like.

The invention discloses a sample application system, which comprises a glass slide storage unit, a sample application unit and a transfer unit, wherein the glass slide storage unit is used for storing a glass slide; the sample application unit comprises a sample application platform used for placing the glass slide and a sample applicator used for carrying out sample application on the glass slide placed on the sample application platform; the transfer unit comprises a transition device and a transfer device; the transition device comprises two transition platforms which are located in a first transition area and a second transition area respectively; the transfer device comprises a first transfer device and a second transfer device; the first transfer device grabs the glass slide and transfers the glass slide between the glass slide storage unit and one of the two transition platforms; the second transfer device grabs the glass slide and transfers the glass slide between the sample application unit and the other of the two transition platforms; the two transition platforms are linked; when one of the two transition platforms is moved from the first transition area to the second transition area, the other of the two transition platforms is moved from the second transition area to the first transition area.

The invention discloses a stable powder supply method and device based on internal and external cyclone fluidized powder, and belongs to the field of fluidized powder conveying. The device comprises a powder storage and supply section and a powder fluidization section. The powder storage and supply section comprises a piston and a storage tank. The powder fluidization section comprises an outer rotational flow fluidization gas inlet, a fluidization cavity, an inner rotational flow fluidization gas inlet, a spray head, a spray head installation block and a contraction outlet. The advantages of mechanical powder supply and pneumatic powder supply are combined, the piston at the tail end of the powder storage tank is driven through external force, the piston is used for pushing powder in the storage tank to accurately control the conveying amount of the powder, and continuous and stable supply of powder materials is guaranteed. In the fluidization cavity, the outer rotational flow shears the powder along the outer layer of the powder and scours the inner wall surface of the fluidization cavity, and the inner rotational flow nozzle generates self-rotation under the counter-acting force of tangential airflow, that is, the powder is fully fluidized by utilizing inner and outer double rotational flows, so that the bad fluidization phenomenon is prevented; and the powder is efficiently and stably conveyed to a target environment with higher pressure after being accelerated by the contraction outlet.

The invention relates to the technical field of biomedical instruments, and particularly discloses full-automatic serological pipette leakage detection equipment. A wheel disc assembly comprises a gear disc and a positioning wheel disc, arc positioning grooves are formed in the positioning wheel disc, and positioning parts matched with the arc positioning grooves are arranged on a conveying chain;first adjustment springs are arranged in spaces among end caps and the bottoms of installation grooves; a feeding slide is defined by each two of a first vertical baffle and a plurality of second vertical baffles, a discharging slide is defined by a third vertical baffle and a fourth vertical baffle, and a baseboard which tilts to a discharging side from a feeding side is arranged between two side boards; sawtooth parts are arranged at positions, away from handle parts, on adjustment rods, sawteeth on the sawtooth parts are of stepwise rising structures, and one end of each adjustment block is of a conical structure matched with the corresponding sawteeth on the corresponding sawtooth part. The full-automatic serological pipette leakage detection equipment has the characters that detection consumption time is little, the automatic degree is high, the detection cost is low, loading is tidy, a material opening is not blocked, and the adaptability is good.

The invention relates to an orchard conveying device with a detachable guide rail and a method. The device comprises a rail and a loading vehicle running on the rail. The rail is composed of a plurality of detachable guide rails. Every two adjacent detachable guide rails are matched in an inserted mode through protruding blocks and grooves. The loading vehicle is divided into a vehicle front portion and a vehicle rear portion according to a front-back position, the front portion and the rear portion are connected through a rotating shaft, traction hooks are fixedly arranged at a front end of the vehicle front portion and a rear end of the vehicle rear portion respectively, and traction ropes are connected with a winch through the traction hooks. The orchard conveying device with the detachable guide rails is simple in structure and stable and efficient in conveying.