66results about How to "Easy to check operation" patented technology

The invention relates to an operation method of a configuration interface of a microcontroller, comprising the follow steps: when a high level is input into a testing port, a serial clock and a serial data are input through an I / O port, the serial data is compared with an operation method code which is internally set, a corresponding operation method can be accessed through the comparison of the effect. The invention also comprises a function testing operation method, a DC parameter testing operation method, a digit / analog conversion testing operation method, a program storage testing operation method, a parallel programming mode operation method and a serial programming mode operation method. The configuration interface operation method of the invention can be scalable, and can access a plurality of testing operation methods and working methods, the access of a chip to different testing or working operation methods becomes more easy.

The present invention discloses an automatic check and maintenance method and system for a server. The method comprises: uploading a to-be-checked server item list to an execution server memory, wherein the to-be-checked server item list comprises a to-be-checked service identifier and to-be-checked items; reading the to-be-checked service identifier in the to-be-checked server item list, and according to the to-be-checked server identifier, searching for a connecting object instance corresponding to a to-be-checked server; establishing a connection between the connecting object instance and the to-be-checked server; and by using the connection, checking and executing to-be-checked items for the to-be-checked server, and receiving check data returned correspondingly. According to the method provided by the present invention, the relevant check items of the to-be-checked server can be checked automatically, so that each check item can be monitored and checked effectively and timely, and the checking precision and efficiency are improved.

The invention relates to a four-dimensional color doppler ultrasound inspection instrument used in the obstetrical department and belongs to the technical field of medical apparatus and instruments. The four-dimensional color doppler ultrasound inspection instrument used in the obstetrical department comprises an inspection console, a detector interface is arranged at the left side of the inspection console, a detector connecting line is arranged in the detector interface, a handle wiring port is formed in the upper side of the detector connecting line, a control handle is arranged at the upper side of the handle wiring port, a control switch is arranged at the right side of the control handle, an ultrasonic detector is arranged at the upper side of the control handle, a color doppler ultrasound display is arranged at the upper side of a display base, a display screen is arranged at the front side of the color doppler ultrasound display, an image adjusting knob is arranged at the right side of the display screen, a central control unit is arranged inside the inspection console, a detection data transmission line is arranged at the left side of the central control unit, and a detection data processor is arranged at the left side of the detection data transmission line. The four-dimensional color doppler ultrasound inspection instrument is simple in structure and easy and convenient to operate and has the function of being capable of providing a convenient and fast color doppler ultrasound inspection function for medical workers, color doppler ultrasound imaging quality is improved, and inspection operation of medical workers is facilitated.

The invention relates to a quarantined diagnostic room. A transparent partition is arranged in a diagnostic room body to divide the inner part of the diagnostic room body into a doctor room and a patient room. Two room doors where personnels come in and go out are arranged on the diagnostic room and are separately a first room door located on the side of the doctor room and a second room door located on the side of the patient room; and the second room door is a sliding door. Independent fresh air ventilators are arranged in the doctor room and the patient room, and the blowing wind pressure of the first fresh air ventilator located in the doctor room is greater than that of the second fresh air ventilator located in the doctor room; a rotatable transparent disc s embedded onto the transparent partition, and an airtight sealing material is arranged at an embedded seam; and an inspection hole through which an arm of a doctor stretches out is formed in the transparent disc, and the inspection hole is formed in the edge of the disc, so that the doctor can control rotation of the disc freely for the convention of operation. The quarantined diagnostic room reduces the risk that the doctor is infected by the patient in an outpatient service process, and the arm of the doctor also can move up and down and left and right in a certain range.

The invention discloses a wireless anorectal dynamic detecting and simulation training device which comprises an intelligent terminal, a wireless communication signal processor device and a solid pressure measuring catheter. The wireless communication signal processor device is in wireless communication with the intelligent terminal; the wireless communication signal processor device comprises a wireless communication module and a single chip microcomputer control panel; the solid pressure measuring catheter comprises a multi-PIN connecting interface, multiple pressure sensors, a connecting hose, a balloon and a connecting adapter, the pressure sensors are evenly arranged on the connecting hose and electrically connected the multi-PIN connecting interface, the multi-PIN connecting interface is composed of multiple PIN contact pins, and the multi-PIN connecting interface is electrically connected with the single chip microcomputer control panel. According to the wireless anorectal dynamic detecting and simulation training device, detection data is transmitted through a wireless technology, a connecting line between the patient and a computer does not need to be paid attention when a patient adjusts the body position, convenience is supplied to examination operation of a doctor, the patient is more comfortable, and position adjusting is more flexible.

A machining center is provided with a guard that covers a processing portion of a machine tool. An openable and closable operation door is provided at the guard front. The operation door is arched along a vertical direction from the guard surface. The operation door is provided with a handle used to open and close the operation door. The operation door is curved on an arched line that reaches a highest point at its center and lowers toward the top and bottom ends. The guard is provided with half-round LED display means protruding from the guard surface. The operation door is made of carbon fiber.

The invention discloses a uniform and fast tea withering machine. A barrel body comprises a top cover, a bottom cover and a barrel wall, wherein the top cover and the bottom cover are buckled at the two ends of the barrel wall. The uniform and fast tea withering machine comprises a plurality of withering devices, each of the withering devices comprises shaft rods and withering troughs, each of the withering troughs is connected with the corresponding shaft rod through a buckle, the adjacent shaft rods are in detachable connection with each other, and a baffle with the same size as a bottom plate of the withering trough is connected to each of the withering troughs; slide rails are arranged on the barrel wall, a pulley in sliding fit with the corresponding slide rail is arranged on each of the withering troughs, resistance sheets are arranged on each of the slide rails and are connected through a resistance plate, air cylinders are connected to the resistance plate, and a hot air blower is connected to the barrel wall. The uniform and fast tea withering machine disclosed by the invention has the benefits that tea leaves are put in the withering troughs of each of the withering devices, each of the withering troughs is connected with the corresponding shaft rod, and hot air is used for withering the tea leaves to accelerate the tea leaf withering speed; withering is performed in the barrel body, so that the floor area is reduced; the resistance plate is connected with the extension air cylinder and the contraction air cylinder, and the two air cylinders alternately run; each of the withering devices gradually moves downwards, so that the temperature is higher and higher, and the tea leaves are gradually withered.

The invention relates to an exhaust cone (1) comprising: a substantially cylindrical front cone part (5); a substantially conical rear cone part (7); a drainage and / or ventilation tube (11) extending inside the front (5) and rear (7) cone parts and emerging at the end of the rear cone part; and a support bearing (13) for supporting the drainage and / or ventilation tube, arranged inside the rear cone part (7). The exhaust cone (1) is characterised in that the rear cone part (7) in turn comprises a front sub-part (7a) connected to the front cone part (5) and a rear sub-part (7b) removably secured to the front sub-part (7a) and equipped with an outlet for the drainage and / or ventilation tube (11).

The invention relates to the field of a mechanical technique, in particular to an ultrasonic diagnosis and treatment bed. The ultrasonic diagnosis and treatment bed comprises a bedstead, wherein a first cylinder and a second cylinder are arranged on the ultrasonic diagnosis and treatment bed, so that the problems that for patients being aged, or suffering from deafness or fracture or people with limited body position caused by various reasons, various ultrasonic examination items cannot be completed are solved. According to the ultrasonic diagnosis and treatment bed, a spring support is arranged, so that the burden of shoulders and necks of ultrasonic doctors at work can be reduced, and the occupational injury degree can be reduced. According to the ultrasonic diagnosis and treatment bed,a drawsheet automatic replacing device is arranged, so that a bed sheet is convenient and swift to replace and is hygienic, and the problem that the replacement of the bed sheet of a diagnosis and treatment bed is relatively troublesome, so that the working efficiency of medical personnel is reduced, is solved. The ultrasonic diagnosis and treatment bed is provided with a coupling agent heater, sothat the problem that the coupling agent is low in temperature in cold season, so that the comfort level experience of patients is poor, is solved.

The invention discloses a novel anorectum endoscope. The novel anorectum endoscope comprises a nozzle, shooting assembly, a light guide optical fiber and a fixed base; the nozzle is fixed to the lower end of an inner tube, the shooting assembly is arranged between the nozzle and the inner tube, the light guide optical fiber connected with the shooting assembly is arranged in the inner tube, a decontamination sleeve is arranged on the outer surface of the lower end of the inner tube, and a blow-off pipe is arranged on the decontamination sleeve; a power device for controlling the nozzle to spray liquid is arranged at the upper end of the inner tube, the fixed base is arranged between the power device and the decontamination sleeve, the upper end of the inner tube is arranged to be a straight tube, and the lower end of the inner tube is arranged to be a tapered tube. The novel anorectum endoscope is reasonable in structural design, lubrication, cleaning and infection prevention can be controlled well, discomfort of a patient can be reduced, the patient can be checked accurately, and the novel anorectum endoscope has the advantages of being small in size, high in movability, convenient and fast in check operation and high in image resolution ratio.

The invention relates to a multifunctional ultrasonic examining bed which comprises a bedstead and bed surface boards. The bed surface boards comprise a bed surface head main board provided with a portion for containing a pillow, a head left side board, a head right side board, a bed surface middle main board, a middle upper left side board, a middle lower left side board, a middle upper right side board, a middle lower right side plate, a bed surface leg main board, a leg left side board, a leg right side board and the like. The bed surface boards are all installed on the bedstead in a hinged mode, turning driving mechanisms which drive all the bed surface boards to turn up and down around the hinged portions are arranged between all the bed surface boards and the bedstead respectively. The multifunctional ultrasonic examining bed mainly solves the problem that at present, patients who are paralyzed or catagmatic or fuzzy in awareness or dizzy and faint or the like cannot well cooperate with doctors to complete various types of ultrasonic examining, examining operations are convenient for ultrasonic doctors, various kinds of damage caused by the situation that the patient cannot be moved are reduced, damage caused by frequent moving to ultrasonic diagnostic equipment which belongs to precise instruments is reduced, and the accuracy and the reliability of diagnosis are improved.

The invention belongs to the technical field of animal husbandry, in particular to an intelligent auxiliary inspection equipment for animal husbandry and veterinary medicine. The following proposal is proposed, including a bottom plate, one end of the bottom plate is fixedly connected with a front side baffle, and the two ends of the front side baffle are installed There are side baffles affixed to the bottom plate, and a clamping adjustment mechanism is installed between the two groups of side baffles. Both ends of the clamping adjustment mechanism are installed with covers fixed to the top of the bottom plate. There are two sets of pedals located on the top of the clamping adjustment mechanism installed between the casings, and the two sets of pedals are arranged symmetrically along the axis of the bottom plate, and the clamping adjustment mechanism is connected with a clamping mechanism. The invention realizes the stable clamping operation of the animal's limbs and head, thereby facilitating veterinary inspectors to perform inspection operations on animals, and at the same time can adjust the clamping position of the limbs according to the size of the animal, which is suitable for different stages and different animal holding operations. The applicability is improved, the clamping is stable and the efficiency is high, and the operation difficulty for the operator to secure the animal is reduced.

A printing apparatus that facilitate a checking operation of printed matter during printing and can avoid deterioration of quality of the printed matter. A printer unit executes a printing process according to an inputted print job. A determination unit determines, when the print job is interrupted during the printing process of the printer unit, whether the interruption requires a check printing. A control unit controls the printer unit to execute the check printing after removing the interruption of the print job using print data of the print job when the determination unit determines that the interruption requires the check printing.

The invention provides circuit board etching equipment which comprises a board feeding device, a developing device, a first inspecting device, an etching device, a second inspecting device, a bulking device, a film removing device and a board discharging device. The developing device comprises a developing mechanism and a first cleaning mechanism; the first cleaning mechanism comprises a first cleaning conveying section, a first cleaning cylinder, a first cleaning spray pipe and a first cleaning spray head. The linear speed of a first inspecting conveying section is larger than that of the first cleaning conveying section, a plurality of containing grooves are evenly formed in a first inspecting board turning mechanism, the first inspecting board turning mechanism can rotate relative to the first inspecting conveying section, and the first inspecting conveying section is used for conveying circuit boards to the containing grooves. The circuit board etching equipment can complete etching operation of the whole circuit boards and is higher in etching efficiency and automation degree. In addition, the first inspecting board turning mechanism is arranged, and the linear speed of the first inspecting conveying section is larger than that of the first cleaning conveying section, so that inspecting operation of inspecting personnel is facilitated after the circuit boards are developed.

The invention relates to the technical field of production of PCBs, in particular to a method for manufacturing multiple solder mask layers on a PCB. The method includes the steps that first, identifications used for marking the solder mask layers are manufactured on a technological side, then, the solder mask layers are manufactured, the corresponding identifications are exposed at the same time, and the identifications are covered with the solder mask layers. According to the method, the identifications used for marking the solder mask layers are manufactured on the technological side of the PCB, the corresponding identifications are covered with the solder mask layer when each solder mask layer is manufactured, the corresponding identifications of the other solder mask layers which have not been manufactured are exposed, and therefore the manufacturing condition of the solder mask layers can be inspected through direct observation, inspection operation is easy and convenient to perform, and mistakes and omissions can be avoided; it is not needed that the PCB is moved to an magnifying lens device, and it can be avoided that the solder mask layers are scratched or contaminated in the moving process of the PCB. The method is simple and easy to implement and convenient to operate, and the production efficiency can be improved.

A machining center is provided with a guard that covers a processing portion of a machine tool. An openable and closable operation door is provided at the guard front. The operation door is arched along a vertical direction from the guard surface. The operation door is provided with a handle used to open and close the operation door. The operation door is curved on an arched line that reaches a highest point at its center and lowers toward the top and bottom ends. The guard is provided with half-round LED display means protruding from the guard surface. The operation door is made of carbon fiber.

The invention provides a bridge assessing device suitable for municipal administration bridge maintenance. The bridge assessing device comprises a supporting base, a microprocessor, a 4G module and abridge assessing center PC end. A working table is arranged over the supporting base; the microprocessor and the 4G module are arranged inside the working table, and a battery power supply set, a loudspeaker, an LED display screen, a touch type operating screen and the 4G module are each generally and electrically connected with the microprocessor. During inspection, a camera is made to aligned with an inspected region, pictures recorded by the camera are transmitted to the bridge assessing center PC end in real time through the 4G module to be displayed so that an assessing worker with rich experience at the bridge assessing center PC end can conduct inspecting and assessing and make the current pictures and steps needing operation displayed through an LED display screen and broadcast through the loudspeaker through network data transmission, and on-site workers can conveniently conduct corresponding inspecting operation according to requirements of the assessing worker.

The invention relates to a detecting unit for detecting the fabric sewing quality. The detecting unit is located at a detecting station of a worktable, and the detecting station is located in front ofthe cloth feeding direction of a sewing station; the detecting unit comprises a second cloth feeding actuator and a cloth feeding detecting mechanism, wherein the cloth feeding detecting mechanism islocated on the second cloth feeding actuator; the second cloth feeding actuator comprises a second cloth feeding roller shaft and support frame structures symmetrically disposed on two sides of the second cloth feeding roller shaft; the second cloth feeding roller shaft can be lifted relative to the worktable under the action of the support frame structures. The detecting unit has the benefits that the detecting unit has the functions of detecting and cloth feeding, and no additional detecting station is required to be arranged, thereby saving the space cost; the detecting unit is automatically adjusted by a controller, and no manual operation is required, thereby saving the labor cost.

The invention relates to aero-engine bleed air test equipment and a test method, and aims to solve the problems that traditional APS bleed air test equipment cannot accurately measure important process parameters such as bleed air temperature, pressure and flow in a starting test process, cannot simulate an environment control bleed air system load to carry out a dynamic test, and does not have other air source interfaces. The equipment comprises an APU bleed air output pipeline, a flow monitoring pipeline, an ATS bleed air input pipeline, an environmental control bleed air pipeline, a bidirectional conveying pipeline, a bidirectional switching pipeline, an exhaust pipeline, an exhaust tower, a first air source output pipeline and a second air source output pipeline. The environment control air entraining pipeline can realize the load test of the environment control air entraining system; a probe and a flowmeter are arranged on each pipeline, so that key process parameters such as bleed air flow, temperature and pressure in the test can be accurately measured; and the first gas source output pipeline and the second gas source output pipeline can support gas supply of various gas sources.

The utility model discloses a movable socket assembly and a sickbed with the movable socket assembly. The movable socket assembly may include: a socket which is movably disposed on a sickbed and usedfor connecting a radio frequency coil; and a cable, wherein one end of the cable is connected to the sickbed and the other end is connected to the socket so as to supply power to the radio frequency coil and transmit a signal, and the cable is movable relative to the sickbed between a stowed position and a deployed position. Through the movable socket assembly, the structure of the radio frequencycoil can be simplified, disordered stacking of cables on a sickbed is avoided, and the comfort level of a patient is improved.

The invention discloses an auxiliary nursing facility for a bedridden patient in neurology department nursing. The auxiliary nursing facility comprises a bed body, a first mounting plate, supporting legs, universal wheels, a pillow, a first rotating shaft, a cover plate, a limiting plate, a supporting rod, a hook, a connecting plate, a collecting box, a first fixing block, a bolt, a waste opening, a control valve, a second rotating shaft, a baffle, a gasket, a limb fixing device and a limb supporting device. The auxiliary nursing facility is reasonable and simple in structure, low in production cost, convenient to mount and complete in function; through mutual cooperation of a motor, a screw, a nut block, a fixing rod, a mounting base, a limb bracket, a third rotating shaft and a connecting frame, limbs of the patient can be fixed and moved, and medical staff can conveniently conduct inspection operation; and through a connecting block, a pin shaft, a first fixing plate and a fixing frame, the body of the patient can be fixed when the patient is unconscious, and the medical staff are prevented from being injured.

The invention discloses a lifting bed for a pulmonary function examination of an infant. The lifting bed comprises a bed body, a protection cover, a breathing mask and a fixing frame; the bed body comprises a bed frame, a bed plate and a box body used for placing the infant, wherein the bed plate is horizontally arranged and connected with the bed frame through a lifting adjusting mechanism; the two sides of the protection cover are movably connected with the bed plate through rotation adjusting mechanisms separately; the breathing mask is used for covering the mouth and nose of the infant andconnected with a lung function instrument through a ventilation pipeline; the fixing frame comprises a fixing rod which is vertically arranged at the edge of a mounting port, the fixing rod is provided with a first adjusting rod, one end of the first adjusting rod is movably connected with the fixing rod, and the other end of the first adjusting rod is provided with a second adjusting rod. By means of the lifting bed for the pulmonary function examination of the infant, the height adjustment of the bed body can be achieved; meanwhile, the safety in the pulmonary function examination process of the infant and the accuracy of examination data are improved.

The invention relates to the technical field of first-aid devices for the ultrasonic department, and provides an examination first-aid device for the ultrasonic department. The examination first-aid device comprises a cardio-pulmonary resuscitation machine, an examination couch and a plurality of supporting legs fixedly connected with the bottom face of the examination couch; cross bars are fixedly connected between sleeves of the supporting legs, and a pair of front and back symmetric adjusting mechanisms are rotationally connected between the cross bars and the bottom face of the examinationcouch; an electric push rod is fixed on any adjusting mechanism through a mounting base, and the electric push rod is fixedly connected to the other adjusting mechanism through the free end of the electric push rod; symmetric grooves are formed in the left side and the right side of a shell of the cardio-pulmonary resuscitation machine in a hollowed-out mode, and a transverse shaft in the front-back direction is fixedly connected in the grooves; convex sliding grooves are symmetrically formed in the left side and the right side of the top face of the examination couch, and the convex slidinggrooves sleeve a cross shaft of the cardio-pulmonary resuscitation machine through two groups of L-shaped connecting rods which are designed in a left-right symmetry mode; the cardio-pulmonary resuscitation machine is located over the examination couch. According to the device, a patient can be timely rescued in time, and the height of the examination couch can be conveniently adjusted.

The invention relates to the technical field of gloves, and particularly relates to a restraint glove with a vital sign monitoring function. The restraint glove comprises a bottom pad, an upper-layerlimiting pad is arranged on the upper surface of the bottom pad, a zipper is further arranged between the bottom pad and the upper-layer limiting pad, a thickened cotton pad is further arranged on thebottom pad, first rough-surface hook-and-loop fasteners are arranged on the inner surface and the outer surface of one end of the thickened cotton pad, and first thorn-surface hook-and-loop fastenersare arranged on the inner surface and the other end; a fixing belt is arranged in a limiting groove, and a restraint belt is further arranged on the fixing belt. The restraint glove is convenient tooperate, firm in structure and better in restraint effect on a patient.

The invention discloses a pediatric special multifunctional examination table. The bed comprises a fixed seat, a sliding slot, a slider, a support frame, a display screen, a bed frame, a escaping groove, a fixed shaft, a rotating bed plate, a restraining belt, a limiting plate, a fixing plate, a bolt. The pediatric special multifunctional examination table has clever structure and powerful function. At first, it is easy for partly manic children with lower limbs inconvenience or cerebral palsy to lie down through the rotation design, so that the bed lightens the burden of medical staff and facilitates the operation of pediatric examinations. Secondly, through the display screen, the purpose of attracting children can be achieved through images, movies and television, effectively reducing the resistance of children, ensuring the smooth progress of examinations, and ultimately achieving a good purpose of promotion and application.

A lift device for neurology examination adopts the structure that a fixed lift groove, which concaves inwards and is arc-shaped, is formed in the upper surface of a fixed lift rod, strip-shaped expansion openings are formed in the side wall of a sleeve in the height direction, positioning bolts are in threaded connection with the side wall of an expansion rod and penetrate the expansion openings in a movable manner, the free end of the fixed lift rod is hinged to a movable lift rod, an upper movable lift groove and a lower movable lift groove, which concave inwards and arc-shaped, are respectively formed in the upper surface and the lower surface of the movable lift rod, the movable lift rod is located on the upper surface of the fixed lift rod after being folded, a fixed insertion card is fixedly connected with the side surface of the fixed lift rod, an insertion rod is movably inserted into the fixed insertion card left and right, the inner end of the insertion rod is integrally and fixedly connected with a push-and-pull rod, the insertion rod and the push-and-pull rod form an L shape, a movable insertion card is fixedly connected with the side surface of the movable lift rod and is in the same as the fixed insertion card in shape, the movable insertion card and the fixed insertion card correspond to each other, and after the movable lift rod extends in an outwardly folding manner, the insertion rod is inserted into the fixed insertion card and the movable insertion rod at the same time.

The invention discloses automobile inner door handle assembling equipment. The equipment comprises a horizontally-arranged workbench. A handle positioning structure used for bearing an automobile reardoor handle is mounted in the middle of the top of the workbench. A handle fixing structure is arranged over the handle positioning structure and is used for fixing a handle in cooperation with the handle positioning structure. A mounting hole is formed in the handle and located in a horizontal position. In addition, a rotary shaft mounting structure is mounted on one side of the top of the workbench and right faces one end of the mounting hole. The automobile inner door handle assembling equipment has the beneficial effects that by arranging a pre-mounting checking structure on the workbench, the position of the mounting hole in the handle can be checked and compared before a rotary shaft is mounted on the automobile inner door handle, accordingly, assembling faults and product damage caused by hole position deviation during assembling of the rotary shaft by means of the rotary shaft mounting structure are avoided, and therefore, the automobile inner door handle mounting quality is improved; and the pre-mounting checking structure adopts an air cylinder for driving, no manual operation is needed, and checking and operation are convenient and fast.

The invention discloses a surface-mounted connector pin inspection tool and method, equipment and a medium. The tool comprises a pin inspection module used for obtaining lamination information of a target PCB and pin information of a surface-mounted connector to be inspected on the target PCB, and inspecting pins of the surface-mounted connector to be inspected according to the lamination information and the pin information, a result display module used for visually displaying a result obtained by inspection of the pin inspection module, and a report generation module used for generating an inspection report according to the result obtained by inspection of the pin inspection module and storing the inspection report. In this way, the surface-mounted connector to be inspected can be inspected according to the lamination information and the pin information. Therefore, the surface-mounted connector in PCB design is automatically inspected, the inspection operation is simple and convenient, missing inspection is not easy to occur, the inspection efficiency is improved, the time consumed by the PCB design is saved, and meanwhile, a system is ensured to have good signal integrity.

A switch cabinet drawer push-pull structure includes cabinet body, mounting drawer, mounting drawer and cabinet body are slidably connected, two sides of mounting drawer are provided with a row of limit holes and arc-shaped strip holes, and two sides of mounting drawer are also provided with round holes on the inner side of both sides of mounting drawer. The two sides of the cabinet body are provided with a clamping part and a limiting part. The switch cabinet drawer push-pull structure of the invention can realize the clamping position of the mounting drawer through the clamping position part, so that the mounting drawer can be positioned and clamped at the required position. As that limit part is arranged, the mount drawer can be pulled out and tilted downward by a certain angle, and theelectric component inside the mounting drawer can be checked and operated more conveniently.