50results about How to "Block the line of sight" patented technology

The invention discloses stained paper for surface decoration of a glass partition, glass and a mirror face, at least comprising a protective film layer, an adhering layer, a substrate layer and an art layer. The stained paper is characterized in that the art layer is arranged on the upper surface of the substrate layer which is a transparent plastic film layer; the bottom surface of the substrate layer is provided with the transparent adhering layer; and the bottom surface of the adhering layer is provided with the protective film layer. The art layer is singly manufactured by a UV ink process, a flocking process, a crystal dispensing process and a flexible-mould relief process, or by combining the flocking process, the crystal dispensing process and the flexible-mould relief process based on the UV ink process or the combination thereof. The glass stained paper prepared by the method has a main characteristic that transparent part and non-transparent part are arranged on a same plane, and has good decoration effect, high quality level as well as convenient installation and change, and is the preferable substitute products of art glass complanation.

The invention belongs to electrochromic technologies, and relates to an intelligent remote-control self-power electrochromic window and a method for manufacturing the same. The intelligent remote-control self-power electrochromic window mainly comprises a solar cell, a voltage controller, a light sensing switch, an electric energy storage and an electrochromic window. Steps for manufacturing an electrochromic device include sequentially depositing various functional layers on transparent substrates and carrying out laminating and sealing assembling; preparing counter electrodes; preparing working electrodes; preparing gel electrolyte; assembling the device. The intelligent remote-control self-power electrochromic window and the method have the advantages that the electrochromic window can have electrochromic functions without additional voltages, the electrochromic degree of the electrochromic window can be regulated, accordingly, the intensity of light from outdoor environments to indoor environments can be dynamically regulated and controlled, and the intelligent remote-control self-power electrochromic window can normally work by the aid of electric energy stored by the electric energy storage without sunlight at night or on cloudy days.

The invention discloses a bulletproof glass which comprises at least three layers of glass basic level. A layer of transparent plastic membrane is arranged between the adjacent two layers of glass basic level; at least one layer of a plurality of glass basic levels is a dimming glass layer which consists of two layers of ITO glass and polymer dispersion liquid crystal materials that are solidified between the two layers of the ITO glass. According to the technical proposal, the dimming glass layer is added on the basis of the present bulletproof glass; therefore the bulletproof glass is opaque in normal state and is transparent under a certain external voltage effect, thus, the transparent state and the opaque state can be switched quickly. When meeting attacks, the bulletproof glass can be switched to be the opaque state quickly to block out lines of sight of raiders, which leads the raiders not to aim at targets, thus protecting the life and property security of users effectively.

The invention discloses a manual tin soldering table for a circuit board. The manual tin soldering table for the circuit board comprises a tin table. A clamping platform for fixing the circuit board is arranged on the tin table, and comprises a base plate. The base plate is connected with the tin table through a rotating shaft. A pressing plate is arranged at the upper portion of the base plate. The side, making contact with the tin table, of the pressing plate is provided with a magnet a. The position, corresponding to the magnet a, of the tin table is provided with a magnet b. The magnetic poles of the ends, making contact with each other, of the magnet a and the magnet b are different in magnetism. A fan for air exhaust is arranged above the clamping platform and located on the tin table. A smoke baffle is arranged above the fan and arranged on the tin table. When the circuit board is soldered, the two faces of the circuit board can be turned over as needed, and meanwhile the circuit board can be well fixed in the soldering process; due to the fact that the fan for air exhaust and the smoke baffle are arranged on the tin table, smoke generated during soldering can be exhausted outwards, the smoke is prevented from affecting the health of an operator and blocking the view of the operator, and the soldering quality is ensured.

The invention relates to snow shaking equipment, in particular to snow shaking equipment for landscape architecture trees. The accumulated snow shaking equipment for the landscape architecture trees is safe, time-saving and labor-saving, and cannot smash workers in a beating process. According to the technical scheme of the invention, the snow shaking equipment for the landscape architecture treescomprises a vehicle body, wheels, a straight sliding rail, a straight sliding block, a mounting seat, a push rod, a mounting plate and the like; the wheels are arranged on the left side and the rightside of the bottom of the vehicle body separately, a groove is formed in the left part of the vehicle body, and the straight sliding rail is arranged on the right side of the top of the vehicle body.Tree branches are clamped through the clamping blocks, a double-stacked-square-shaped sliding rod moves up and down to drive the tree branches to move up and down, so that the accumulated snow of thelandscape trees is shaken down, a swinging plate can prevent the accumulated snow from hitting the vehicle body when the accumulated snow is shaken down, whether the accumulated snow on the landscapetrees is shaken down or not can be conveniently observed through a snow guard, and the accumulated snow on the landscape trees can be prevented from falling onto a user or even blocking the sight ofthe user when the accumulated snow on the landscape trees is shaken down.

The invention discloses a preparation method of visible patterns of outdoor glasses. The preparation method comprises the following steps: making printing ink patterns, then forming a metal electroplated layer on the surface by means of electroplating, and finally simultaneously tearing off the printing ink patterns and corresponding metal electroplated layer by using an adhesive tape, and carrying out mutual reflection on the remained metal electroplated part and a printing ink printing region of a lens base material to form the visual patterns of lenses. When printing ink is printed, LOGO patterns or marks of glasses manufacture factories or portrait patterns customized by a glasses wearer are formed by printing is carried out on the lenses. The lenses of the outdoor glasses have the visual patterns such as LOGO patterns in the front, and have an attractive effect; light can not be blocked on the back surfaces of the lenses, and slight lines are shielded, and thus the preparation method is safe and reliable to use.

The invention discloses a height limiting device and system for preventing a vehicle top from being cut and a height limiting method thereof. The height limiting device comprises speed and height measuring marker posts and a height limiting frame, wherein measurement information is sent to a background computer after the speed and height measuring marker posts measure the speed and height of a running vehicle, and the background computer judges the speed and height of the vehicle and then sends an instrument to the height limiting frame. The height limiting frame comprises vertical supporting rods, a cross rod, a baffle plate, a baffle plate rotation driving assembly and a dye spraying assembly, wherein the vertical supporting rods are arranged on two sides of a road at intervals, the cross rod is arranged between the vertical supporting rods, two ends of the baffle plate are rotatably connected to the two vertical supporting rods, the baffle plate rotation driving assembly is connected to one end of the baffle plate, and when a vehicle with the height exceeding the height limit passes through, the baffle plate rotation driving assembly drives the baffle plate to rotate, and the dye spraying assembly arranged on the baffle plate sprays a dye to the vehicle top so as to warn a vehicle driver. The top is prevented from being cut by adopting the rotation structure design of the baffle plate. In addition, warning is performed in dye spraying, shooting and recording modes.

The invention relates to an anti-cheating desk, in particular to an anti-cheating desk for a high school campus examination. According to the anti-cheating desk for the high school campus examination, the accuracy of student testing is improved, and meanwhile, the states of students can be prevented from being affected. The anti-cheating desk for the high school campus examination comprises a bottom plate supporting plate installed on one side of a bottom plate; a placing plate is mounted at the top of the supporting plate; a blocking mechanism is mounted between the bottom plate and the placement plate and is used for blocking sight lines of other people; a lifting mechanism is mounted between the blocking mechanism and the placing plate. The extension end of a first electric push rod extends to drive a blocking plate to slide upwards, so that an examination paper is shielded. Other examinee sight lines are blocked, the examinee cheating behavior is avoided. When the examinee is off-field, the extension end of a second electric push rod is shortened. Therefore, the lifting plate drives the examinee to move downwards, and the examination paper is prevented from being seen by others while leaving the examination room.

The present invention relates to a shutter type curtain, and especially to a shutter curtain which is obtained by forming a plurality of shutter units on the back surface of the fabric curtain with a regular distance. In this way the functions of light beam regulation, visual line obstruction, sound insulation, cold prevention and rat prevention can be executed, and at the same time the functions such as indoor scenery setting can be executed thereby further strengthening these functions. The manufacture and procession are extraordinarily easy. The curtain can be combinedly used indoors and outdoors without worry about noise and breakage. Namely, the preparation for the diaphragm type shutter unit (2) comprising the following procedures: preparing connecting yarn on the back side of the shutter unit through forming a plurality of shutter units which are formed along the line direction with a regulated distance, knitting the upper end and lower end of the connecting yarn with the upper end and lower end of the space at the back side of the shutter units to hold the protrusion of the units, and compelling the lower end of the shutter unit (2) to fold.

The invention relates to decoration building materials, in particular to a window changeable in color. On the basis of utilizing an existing window, the window changeable in color shields vision and the sun. Window glass comprises two layers, seal rubber is arranged inside the window glass, and a water pump is connected with a pigment water box so that pigment can enter the window, and color changing can be achieved. Indoor brightness is increased, and the vision is shielded. The window changeable in color is convenient to use and practical. Colors are automatically selected.

The invention discloses a desk, and particularly discloses a multifunctional desk which comprises a desk body and a bookshelf bin. The multifunctional desk is characterized in that the bookshelf bin is arranged at the front end of the desk body, book stands are arranged in the bookshelf bin, suckers are arranged at the bottoms of the book stands, folding shafts are disposed on the tops of two ends of the bookshelf bin, and a fixing screw is disposed on the outer side of each folding shaft. The multifunctional desk has the advantages that the multifunctional desk facilitates the storage of books for students, and the problem that the books piled up like a mountain stops sight of the students is avoided.

The invention discloses a high-frequency electrotome for laparoscopic surgery. The high-frequency electrotome includes an electrotome body, a grip rod, a spray pipe, a suction pipe, a first water tankand a second water tank. The electrotome body, the spray pipe and the suction pipe are inserted in the grip rod, the portions, corresponding to the electrotome body, the spray pipe and the suction pipe, inside the grip rod are provided with a first guide rail, a second guide rail and a third guide rail respectively, the first guide rail is internally provided with a first slider, the second guiderail is internally provided with a second slider, the third guide rail is internally provided with a third slider, an air pump is arranged between the first water tank and the second water tank, theright side of the air pump is connected with the first water tank through a second water pipe, and the right end of the grip rod is provided with and fixedly connected with a right cover. The electrotome is very convenient to use and can prevent hindering of vision, The technology is supported by the National Natural Science Foundation of China (81770512) in 2017 and the 'Three Projects' project of Shenzhen Health Planning Commission (SZSM201812055) in 2018.

The invention discloses a power station boiler membrane type water-cooled wall cleaning device. The power station boiler membrane type water-cooled wall cleaning device comprises a shell, wing devices are arranged on the two sides of the shell, a water spraying device is fixed at the top of the shell, a driving device is arranged at the bottom of the shell, a dust removing mechanism is movably connected to the output end of the driving device, and a camera shooting mechanism is fixed on the side, close to the dust removing mechanism, of the shell. According to the power station boiler membrane type water-cooled wall cleaning device, the effect that people do not need to enter a boiler to perform dust removing treatment on the membrane type water-cooled wall inside the boiler can be achieved, moreover, through the power station boiler membrane type water-cooled wall cleaning device, the membrane type water-cooled wall inside the boiler can undergo full-aspect dust removing treatment, the operation is relatively simple, and the certain efficiency is achieved.

The invention discloses a multilayer imaging screen electric fireplace which comprises a shell, an imaging light source, a ray-processing device and an imaging screen. The imaging screen comprises a main imaging screen and at least two auxiliary imaging screens, wherein the auxiliary imaging screens are arranged behind the main imaging screen and arranged side by side in the fore-and-after direction of the main imaging screen, and the lower end of either auxiliary imaging screen is in a suspension structure. The invention effectively solves the problems of small levels and small depth range of flames, absence of three-dimensional flames in a multilayer structure and poor three-dimensional effect of the electric fireplace in the prior art. The invention overlaps simulated flames on a plurality of imaging screens to form a flame image with rich layers, great depth and strong three-dimensional sense, remarkably improves the flame simulation effect of the electric fireplace and greatly improves the art infectivity of the electric fireplace.

The invention discloses a ventilator for a door and a window, and aims to provide a ventilator capable of ventilating, blocking visual lines and protecting privacy of a room. The ventilator comprises a frame body (1), two pairs of vertical opposite connecting rods are disposed in a chamber of the frame body, rows of transversal hexagonal prism bars (4) are embedded in the outside face of the frame body (11), a first pair connecting rod (2), a second pair connecting rod (3), and the inside face of the frame body (12), the hexagonal prism bars (4) are arranged at intervals to form four hexagonal prism bar layers from the front to the back, hexagonal prism bars of two adjacent hexagonal prism bar layers are staggered to shield spaces between hexagonal prism bars in the front and rear hexagonal prism bar layers.

The invention relates to a door-free toilet in lavatory, which comprises a toilet frame, a toilet stool arranged in toilet frames and a deformable marker. The four toilet frames comprise a first baffle, a second baffle, a third baffle and a fourth baffle; the four baffles encloses a use space of which an entrance is positioned between the first baffle and the fourth baffle. The front end of the first baffle is provided with a partition fixed at the entrance and extending towards the inside of the use space in a bending mode so as to block sight from the outside. The deformable linear marker isfixed at the entrance, the upper end thereof is higher than the toilet frame, a user can properly change the shape of the marker when use the toilet to show that the toilet is occupied and prevent other people from rushing into the toilet, and restore the marker after using the toilet so as to show that the toilet is vacant. The door-free toilet of the invention can save cost on the lavatory construction and strengthen the ventilation and the lighting effect of the lavatory. A user can know the vacant states of all the toilets by looking up at the deformable linear marker.

The invention discloses a raincoat, which comprises a rainproof cap and a raincoat body, wherein the rainproof cap is fixed above the raincoat body through a zipper; the raincoat body comprises an inner layer and an outer layer; an expansion ring is arranged between the inner layer and the outer layer; an ultrasonic sensor, a buzzer and a microprocessor are arranged on the inner layer; and the microprocessor is respectively connected with the ultrasonic sensor and the buzzer. By virtue of the structure, the raincoat can give an alarm to a wearer by detecting an obstacle, thus having an effect of preventing the user from being collided.

The invention discloses a fixing device for treatment injection by a veterinarian and relates to the technical field of veterinary auxiliaries. The fixing device comprises a bottom plate, wherein a lifting mechanism is fixed onto the upper surface of the bottom plate, a supporting frame is fixed to the top end of the lifting mechanism, a trunk fixing mechanism and two limb fixing mechanisms are connected to the supporting frame in a sliding manner, a head shielding mechanism is fixed to the supporting frame, and the trunk fixing mechanism is arranged between the two limb fixing mechanisms. According to the fixing device, through using the trunk fixing mechanism and the limb fixing mechanisms, when an animal is subjected to injection, the animal can be firmly fixed, and the circumstances that the animal is subjected to secondary injury due to struggle and personnel are scratched and bitten by the animal during treatment on the animal are avoided; meanwhile, an animal trunk supporting length of the trunk fixing mechanism can be adjusted as required, and thus, the trunk fixing mechanism can have a supporting area; and a thick cotton fabric wound on a cotton fabric reel is uniformly laid on the surface of a first arc-shaped supporting plate and the surface of a second arc-shaped supporting plate through a fabric guide roll, and thus, the degree of comfort during animal trunk supporting is increased.

The invention provides a protection clothing for new coronavirus nucleic acid detection. The protection clothing comprises a protection head cover, a protection clothing body, protection leg sleeves and a sealing zipper which are integrally connected, wherein the back portion of the protection clothing body is connected with an air inlet device in a sealed mode, a first air inlet, a second air inlet and an ice storage area are sequentially arranged from outside to inside, the heel portions of the protection clothing body is tightly connected with two air outlet devices, and the two air outlet devices are rectangular box bodies and comprise cover plates, fans, fixing plates, filter screens and box bodies. The protection clothing for new coronavirus nucleic acid detection has the following beneficial effects that fresh gas can be continuously blown into the protection clothing, so that air is circulated; the air outlet device is arranged at the heel portion, so that the infection probability is reduced; the cover plate and the fan have the effect of ensuring that blown air can support the whole protection clothing, so that the protection clothing is prevented from being in direct contact with the skin of a medical worker; and the air blow holes and the obliquely arranged transparent mask can prevent too much condensate water from blocking the sight of medical staff.

The invention discloses a preparation method of visible patterns of outdoor glasses. The preparation method comprises the following steps: making printing ink patterns, then forming a metal electroplated layer on the surface by means of electroplating, and finally simultaneously tearing off the printing ink patterns and corresponding metal electroplated layer by using an adhesive tape, and carrying out mutual reflection on the remained metal electroplated part and a printing ink printing region of a lens base material to form the visual patterns of lenses. When printing ink is printed, LOGO patterns or marks of glasses manufacture factories or portrait patterns customized by a glasses wearer are formed by printing is carried out on the lenses. The lenses of the outdoor glasses have the visual patterns such as LOGO patterns in the front, and have an attractive effect; light can not be blocked on the back surfaces of the lenses, and slight lines are shielded, and thus the preparation method is safe and reliable to use.

The invention relates to snow shaking equipment, in particular to snow shaking equipment for landscape architecture trees. The accumulated snow shaking equipment for the landscape architecture trees is safe, time-saving and labor-saving, and cannot smash workers in a beating process. According to the technical scheme of the invention, the snow shaking equipment for the landscape architecture treescomprises a vehicle body, wheels, a straight sliding rail, a straight sliding block, a mounting seat, a push rod, a mounting plate and the like; the wheels are arranged on the left side and the rightside of the bottom of the vehicle body separately, a groove is formed in the left part of the vehicle body, and the straight sliding rail is arranged on the right side of the top of the vehicle body.Tree branches are clamped through the clamping blocks, a double-stacked-square-shaped sliding rod moves up and down to drive the tree branches to move up and down, so that the accumulated snow of thelandscape trees is shaken down, a swinging plate can prevent the accumulated snow from hitting the vehicle body when the accumulated snow is shaken down, whether the accumulated snow on the landscapetrees is shaken down or not can be conveniently observed through a snow guard, and the accumulated snow on the landscape trees can be prevented from falling onto a user or even blocking the sight ofthe user when the accumulated snow on the landscape trees is shaken down.

A special password inputting security terminal for the blind comprises a keyboard body 1, a push switch 1a, a photoresistor a2, a photoresistor b2a, sound emitting ports 2b, Braille buttons 3, connecting bolts 4, a front shielding mask 5, a pull handle 5a, a front limiting strip 5b, a front shielding mask edge 5c, a middle shielding mask 6, a middle limiting strip a6a, a middle limiting strip b6b, a rear shielding mask7 and a rear limiting strip 7a. As the Braille buttons are installed, the blind can conveniently and correctly use the small keyboard. The non-transparent shielding masks installed on the small keyboard can effectively shield the sight of other people. In order that the blind can input a password trustingly, the two photoresistors are further installed; when the front shielding mask edge presses the push switch, and the two photoresistors are not simultaneously shielded, loudspeakers installed in the sound emitting ports send a warning signal, and the warning signal is stopped when the shielding masks totally shield the sight of other people.

The invention relates to a school supply rack used in a home and a school. The school supply rack comprises a square framework. The length of the framework is smaller than or equal to the length of a desk. The rear end face of the framework is provided with a transparent sealing plate. Two vertical plates are arranged in the middle of the framework in parallel. A transverse plate for dividing the space formed by the two vertical plates and the framework into an upper cabinet body and a lower cabinet body is arranged in the middles of the two vertical plates. Turnover retractable doors for closing the cabinet bodies are arranged on the tops of the front ends of the cabinet bodies. Locks for locking the turnover retractable doors are arranged at the bottoms of the front ends of the cabinet bodies. The school supply rack is simple in structure and convenient to use.

The invention belongs to the field of awnings and relates to a rotary electric vehicle awning. The awning comprises a folding awning body, a front blocking cover and a transparent plate; the front blocking cover is fixed at the front end of the vehicle head of a vehicle body; an opening is formed in the front blocking cover; the transparent plate is fixed in the opening of the front blocking cover; and the folding awning body is fixed at the top end of the front blocking cover. According to the rotary electric vehicle awning of the invention, rainwater floating from the front is blocked through the front blocking cover, and the transparent plate can block rain without blocking the sight of a rider; the folding awning body can be opened in rainy days so as to shield rainwater from above andcan be folded in sunny days, and therefore, the trouble that a user disassembles and assembles the awning is avoided.

A clamper without hinging axle for forging is composed of casing, two clamping jaws with arc handles which are mutually crossed and the cylindrical bodies arranged between said clamping jaw and arc handle, an axially sliding pull plate between the crossed arc handles, and the guide block and wedge block fixed at upper and lower sides of said pull plate. Its advantages are long clamping jaw and handle for high clamping force moment, not burning off the clamper, and not tearing off the casing.

The invention relates to the technical field of protective glasses, in particular to medical X-ray and gamma-ray protective glasses which comprise a nose bridge frame, frames are fixedly connected to the two ends of the nose bridge frame, glasses legs are rotatably connected to the side surfaces of the upper ends of the frames, glasses lenses are fixedly connected to the interiors of the frames, and the glasses lenses are made of high-lead transparent glass; a heating mechanism is fixedly connected between the frame and the spectacle lenses and is used for heating the spectacle lenses, the spectacle lenses are made of high-lead transparent glass, and the heating mechanism comprises a connecting wire, a heat-conducting plate strip and a coil. When water mist appears on the goggles of the medical staff, the heating mechanism is powered by an external charge pal and is turned on, and high-frequency current is generated in the coil, so that the heat-conducting battens are rapidly heated, the heated heat-conducting battens heat the spectacle lenses, the water mist on the surfaces of the heated spectacle lenses is rapidly evaporated, and the safety of the medical staff is improved. And the sight of a user is not blocked by the water mist.

The invention relates to the field of automobile parts, in particular to an insertion-type automobile engine hood. The engine hood is composed of a left engine hood body and a right engine hood body,the left side of the left engine hood body is connected to the left side of the head of an automobile through a fixing shaft, and the rotation axis of the left engine hood body is fixed when the leftengine hood body is opened or closed; the right side of the right engine hood body is connected to the right side of the head of the automobile through a pull-insertion assembly; the pull-insertion assembly comprises an L-shaped crankshaft, a transmission shaft and a servo motor; a connection block is arranged on the lower surface of the right engine hood body; one end of the L-shaped crankshaft is connected with the connection block on the lower surface of the right engine hood body through a shaft; the other end of the L-shaped crankshaft is connected with the transmission shaft; the transmission shaft is fixedly arranged in the head of the automobile and can be driven by the servo motor to rotate; a sealing clamping strip is arranged at the left side edge of the right engine hood body;a sealing clamping groove which is matched with the sealing clamping strip is formed in the right side edge of the left engine hood body; the sealing clamping strip can be driven by the pull-insertionassembly to be inserted in or pulled out of the sealing clamping groove.

The invention belongs to the field of parking systems, and discloses an intelligent optimal scheduling system for parking. The system comprises a hanging plate, hanging rods are symmetrically mountedon the upper surface of the hanging plate, a plurality of mounting rods are symmetrically mounted on the lower surface of the hanging plate, and the same horizontally arranged mounting plate is fixedat the bottom ends of the plurality of mounting rods. A movable ring is slidably mounted on the upper surface of the mounting plate, first fixing rods are symmetrically welded to the lower surface ofthe movable ring, second fixing rods are welded to the bottom ends of the first fixing rods, a cleaning brush is arranged on one side wall of each second fixing rod, a protective cover is fixed to thelower surface of the mounting plate, heat dissipation holes are formed in the bottom wall of the protective cover, and dustproof nets are fixed into the heat dissipation holes. Fixing rods are symmetrically installed on the lower surface of the movable ring, and fixing bases are welded to the bottom ends of the fixing rods. The system is novel in design, ingenious in structure and intelligent indispatching system, parking of a vehicle owner is facilitated, the equipment has dustproof and heat dissipation functions, long-term normal use of the equipment is guaranteed, and the system is simple, convenient and worthy of popularization.

The invention discloses a bamboo fiber composite door of a toilet. The bamboo fiber composite door comprises a door frame and a bamboo fiber door plate, wherein the bamboo fiber door plate is mounted in the door frame; a water discharging hole is formed in the bottom of the door frame; a plastic sleeve is mounted in the door frame; steel nails are arranged in the plastic sleeve; a rivet is arranged at the top of the bamboo fiber door plate; frosted glass is arranged at one side of the rivet; a glass retaining strip is arranged at the edge of the frosted glass; a handle is mounted at one side of the frosted glass; a stainless steel sleeve ring is arranged at one end of the handle. The bamboo fiber composite door of the toilet, disclosed by the invention, is simple in structure; the door frame is tightly fixed on a wall through the four steel nails, so that the stability of the door can be guaranteed; the bamboo fiber door plate is not changed due to water spraying, and wood does not bring out a cold feeling to people; the frosted glass is utilized so that the harmony of the appearance is solved and the sight is shielded; a push-pull door is provided with the handle, so that the door can be conveniently opened and closed and a towel can be conveniently stored, and the practicability is very strong.