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24results about How to "Wide audience" patented technology

Low-viscosity sodium alginate, preparation method and soft capsule shell containing pure sodium alginate component

The invention relates to low-viscosity sodium alginate, a preparation method and a soft capsule shell containing a pure sodium alginate component, and belongs to the technical field of biochemical engineering, the viscosity and molecular weight of the low-viscosity sodium alginate are 15mPa. S and 273.08 kDa; the molecular weight is 30 mPa.s and the molecular weight is 310.5 kDa; according to the present invention, the ratio of the Da to 665.43 kDa is 20.48%, the ratio of the Da to 444.79 kDa is 16.87%, and the ratio of the Da to 322.06 kDa is 62.66%; or when the molecular weight is 70 mPa.s, the molecular weight of 466.92 kDa accounts for 44.27%, and the molecular weight of 329.27 kDa accounts for 55.73%. The invention also provides a preparation method of the low-viscosity sodium alginate, which comprises the following steps: dissolving the sodium alginate as a raw material, carrying out enzymolysis by using alginate lyase, sampling at regular time, measuring the viscosity, carrying out enzyme deactivation treatment on the enzymatic hydrolysate when the viscosity reaches the specified viscosity, and carrying out evaporation concentration, alcohol precipitation, drying and crushing to obtain the low-viscosity sodium alginate. The low-viscosity sodium alginate can be used for preparing a soft capsule shell which is stable in property and good in enteric characteristic.
Owner:FIRST INSTITUTE OF OCEANOGRAPHY MNR

Method and system for converting patent text into video based on AI technology

The invention provides a method and a system for converting a patent text into a video based on an AI technology. The method comprises the following steps: acquiring patent technology information and information used for generating copywriting keywords; generating picture information according to the patent technology information, generating copywriting information and audio information according to the information used for generating copywriting keywords, and synthesizing the picture information, the copywriting information and the audio information to obtain video information; and according to the generated picture information, copywriting information, audio information and video information, adjusting patent technology information and / or information used for generating copywriting keywords, and repeating the previous step until video conversion of the patent technology is completed. According to the patent technology information provided by the user, the keywords in the patent technology information can be extracted to automatically generate professional and accurate video content, the video production period is greatly shortened, meanwhile, the user can visually know the technology content, conversion of scientific and technological achievements is facilitated, and the patent technology is better promoted and popularized.
Owner:SHANGHAI HENGHUI INTELLECTUAL PROPERTY SERVICE CO LTD

Passive exoskeleton robot for elderly health and emergency rescue escape

The utility model discloses a passive exoskeleton robot for health and emergency rescue escape of old people, which is detachable and comprises two protective arms, a robot body and a robot body. The back shell comprises two back supporting rods, a supporting column and two reinforcing plates, the two back supporting rods are detachably arranged on the two protective arms in the vertical direction, the supporting column is located between the two back supporting rods, and the two reinforcing plates are arranged at the upper ends and the lower ends of the two back supporting rods in the horizontal direction; the waist and back support comprises a back protection pad, a safety air bag and an equipment fixing device, the safety air bag is arranged between the back protection pad and the two back supporting rods, the equipment fixing device comprises two straps pulled to the lower portion of the equipment fixing device through the back shell, and a heat insulation part is arranged in the safety air bag; and each leg guard is provided with a heat absorption part and a hook. The passive exoskeleton device is convenient for old people to wear, has advanced functions of climbing stairs, escaping from fire disasters and the like, provides a comfortable passive exoskeleton device for the old people, and has a wide market prospect.
Owner:JILIN JIANZHU UNIVERSITY

A blueberry lutein ester hawthorn cookie with vision-protective properties and its preparation method

This invention relates to a blueberry lutein ester hawthorn cookie with a protective effect on vision and its preparation method. The raw material composition is as follows: 100-180 parts flour, 20-80 parts palm oil, 20-80 parts maltitol, 1-30 parts roasted wheat bran, 1-15 parts soybean dietary fiber, 1-10 parts polydextrose, 1-20 parts blueberry powder, 1-20 parts hawthorn powder, 1-20 parts leavening agent, 0.1-6 parts flavoring agent, 0.1-3 parts disodium dihydrogen pyrophosphate, 0.1-3 parts phospholipids, 1-5 parts lutein ester, 0.001-1 part water-soluble β-carotene, 0.1-4 parts blueberry flavoring, and 2-50 parts water. This cookie uses lutein ester, blueberry powder, and water-soluble β-carotene in a scientifically formulated ratio. After being absorbed by the human body, these three ingredients work synergistically to relieve eye fatigue and greatly enhance the protective effect on vision. It also has the advantages of good appearance and color, low calories, crispy and delicious taste, while being low in sugar, relieving eye fatigue, protecting the eyes, rich in dietary fiber, strengthening the spleen and aiding digestion, and maintaining normal intestinal function.
Owner:QING YUAN FOOD

Multifunctional cup for oral nutrition supplement patient

The utility model relates to a multifunctional cup for oral nutrition supplement patients, which comprises a cup body and a cup cover and further comprises a base fixedly connected with the bottom of the cup body. The controller is arranged in the base; the stirring module is arranged in the base; the heating module is arranged in the base; and the timing module is arranged in the base. Compared with the prior art, a nutrient solution in the cup is heated and kept warm through the heating module, the optimal taking temperature of an oral nutrition preparation is controlled to be 35-38 DEG C, stimulation to gastrointestinal tracts is effectively avoided, and diarrhea is prevented; the stirring assembly is used for stirring the nutrient solution in the cup, so that the phenomenon that the oral nutrient solution is caked and cannot reach a nutrition target value required by an organism or causes dyspepsia and digestive tract intolerance is avoided; a user can conveniently record the preparation time of the nutrient solution through the timing module, so that the prepared oral nutrient solution can be stored at normal temperature for not more than 4 hours and refrigerated for not more than 24 hours to avoid pollution and deterioration.
Owner:ZHONGSHAN HOSPITAL FUDAN UNIV

Road protection facility

A winter defense facility which is suitable for actively preventing snow weather from harming roads in advance in winter in the north comprises stand columns, a cross beam, an arch crown, a wind shield, reinforcing ribs, a metal net, an auxiliary arch top and the like. A long shed for shielding a road and a round shed for leisure and entertainment of people are formed by vertical columns, a cross beam, a vault, reinforcing ribs, a metal net, a wind shield and an auxiliary vault (support). Due to the establishment of the long shed and the round shed, the trouble of removing accumulated snow on the road and accumulated snow on the site can be avoided, and the interference of wind and snow on production and life can be solved. During installation, the main columns, the cross beams and the vault are connected and fixed into a frame, and the metal net with the reinforcing ribs and the auxiliary vault (support) are fixed on the frame. When snow falls, the snow falls on the metal net, blocks the holes of the metal net and is stacked to form a snow layer, the reinforcing ribs and the metal net form a firm skeleton of the snow, and a firm protection body capable of shielding both wind and snow is formed.
Owner:张留品

Self-adaptive passive wearable hemodialysis machine load device for complex terrain

The application discloses a kind of complex terrain-oriented adaptive passive wearable hemodialysis machine load devices, including the load platform of wearing in the waist of user, hemodialysis machine is carried in the inside of load platform, outside is equipped with wearing fixed structure, two ends are respectively equipped with leg structure;The leg structure includes the spring recovery device A of being adapted to swing inside and outside of thigh inside measurement, femoral skeleton and calf skeleton;The rear end of the femoral skeleton is equipped with load-bearing connecting rod device, and the rear end of calf skeleton is equipped with power-assisted connecting rod device;The spring energy storage device B is equipped in the hip joint of the femoral skeleton and load platform connection, and the spring energy storage device C is equipped in the knee joint of the femoral skeleton and calf skeleton connection;Femoral skeleton and calf skeleton inside are equipped with the structure of adjustable leg binding height of different body type wearers;The lower end of the leg structure is equipped with foot structure;Spring recovery device D that can be adapted to swing inside and outside of ankle is equipped in the ankle joint of foot structure.
Owner:BEIJING UNIV OF TECH

Multifunctional folding walking stick stool

The utility model discloses a multifunctional folding walking stick stool, which belongs to the technical field of walking stick stools and comprises a stool panel, second hinge lug plates are symmetrically arranged on the upper portion of the back of the stool panel, sliding sleeves are hinged to the second hinge lug plates, and a first long supporting rod and a second long supporting rod are slidably arranged on the left sliding sleeve and the right sliding sleeve. The tops of the first long supporting rod and the second long supporting rod are connected with a backrest. The upper end of the backrest is provided with a handrail through a walking stick rod. A limiting sleeve matched with the sliding sleeve is arranged in the middle of the first long supporting rod and the middle of the second long supporting rod, a short supporting rod is hinged to the lower portion of the limiting sleeve through a shaft rod, the top end of the short supporting rod is hinged to a first hinge lug plate through a hinge shaft, and the first hinge lug plate is fixedly arranged on the back face of the stool face plate; a first-aid box is arranged in the center of the back of the stool panel. The multifunctional folding walking stick stool is simple in structure, convenient to use, high in stability and safety, wide in audience range and good in market popularization value.
Owner:HENGSHUI XINYESHENG MEDICAL EQUIP CO LTD +1

Immunohistochemical double-staining color development system, detection kit and immunohistochemical double-staining detection method

The invention relates to an immunohistochemical double-staining color development system, a detection kit and an immunohistochemical double-staining detection method, and belongs to the technical field of biomedicine. The immunohistochemical color development system is composed of HRP-Magenta, HRP-Cyan, HRP-Gold, AP-Gold and basic fuchsin dyeing reagents, the reagents are combined to form two color development systems including a sequential double-dyeing color development system and a combined double-dyeing color development system, dyeing in a sequential double-dyeing mode and a combined double-dyeing mode can be achieved, dipositive cells can present a third color, and the color development efficiency is improved. And two single positive cells can be obviously distinguished, so that the interpretation is more accurate and quicker. In addition, the sequential double-staining developing system is composed of the HRP system and the AP system, so that the selectivity of the whole developing system is higher, the requirements of different users can be met, meanwhile, the developing system can be customized according to the requirements of the users, and the use flexibility of the immunohistochemical double-staining reagent is improved.
Owner:HENAN CELNOVTE BIOTECHNOLOGY CO LTD

Preparation method of jasmine tea

The invention discloses a preparation method of jasmine tea. The preparation method comprises the following steps: picking fresh tea leaves and fresh jasmine flowers; pretreating the fresh tea leaves and the fresh jasmine flowers; processing the pretreated tea leaves, and adding the material bag into the tea leaves; mixing the processed tea leaves with the scented jasmine flowers, and carrying out scenting treatment; the jasmine tea subjected to scenting treatment is subjected to drying treatment, meanwhile, fruity fragrance is generated by burning fruity spice, the fruity fragrance is introduced into drying equipment through a single pipeline, the fruity fragrance is used for smoking the jasmine tea in the drying process of the jasmine tea, and therefore the jasmine tea is smoked; the tea leaves can absorb the fragrance of jasmine flowers and the fragrance of fruit flavor, so that the taste of the jasmine tea is enriched, the jasmine tea caters to the hobbies of young people at present, and the audiences of the jasmine tea are wider.
Owner:GUANGXI HUAXIANZI TEA CO LTD

Mahjong tile storing device, mahjong tile distributing device, mahjong tile storing assembly and mahjong machine

The invention discloses a tile storing device, a tile distributing device, a tile storing assembly and a mahjong machine, the tile storing assembly comprises the tile storing device and the tile distributing device, a tile storing channel is concavely arranged in the tile storing device, the tile storing channel is provided with a tile inlet, a first tile outlet and a second tile outlet, and a main channel connecting the tile inlet and the second tile outlet is located at a lower position. The first card outlet is communicated with the main channel through the branch channel at a higher position; the dealing device is used for guiding the dealing sequence to enter the sub-channels. The mahjong tile storage assembly not only can be compatible with various mahjong tile playing methods, but also can ensure that the mahjong machine has high shuffling efficiency all the time.
Owner:HANGZHOU TIANJI TECHNOLOGY CO LTD

A passenger flow audience analysis method, system and storage medium for pushing information

ActiveCN117911073Bwide audienceMarket data gathering
The present invention provides a method, system and storage medium for analyzing a passenger flow audience for pushing information, and relates to the technical field of audience analysis, comprising: step S1, using a camera to shoot at a fork in a shopping mall; step S2, analyzing passenger flow videos and passenger flow forks, and establishing a passenger flow daily table, a passenger flow weekly table and a passenger flow monthly table based on the analysis results; step S3, establishing an analysis line graph based on the passenger flow daily table, the passenger flow weekly table and the passenger flow monthly table; step S4, setting an audience for pushing information based on the analysis line graph; the present invention is used to solve the problem that there is a lack of targeted and effective improvement methods in the analysis of passenger flow audiences in the prior art, resulting in a lack of strong data support for passenger flow audience analysis when pushing information, and the most effective information cannot be pushed to target users quickly and accurately.
Owner:JIANGSU INST OF ECONOMIC & TRADE TECH +1

Intelligent diagnosis auxiliary identification system for endometrial lesions

The invention provides an intelligent diagnosis and auxiliary recognition system for endometrial lesions, and relates to the technical field of artificial intelligence, and the system obtains eye parameters of a to-be-detected eye image through a CDFI image detection module, and also obtains the classification of eye diseases corresponding to the to-be-detected eye image through a CDFI image feature extraction module. In addition, the medical image analysis method and the medical image analysis system can process a large number of patient cases, and effectively relieve the working pressure of diagnosis personnel in a high-intensity working environment. Through automatic image analysis and parameter recording, the efficiency of a clinical working process is remarkably improved, the possibility of recording errors in the process of manually recording image parameters can also be reduced, meanwhile, the workload of doctors is also reduced, the learning cost of medical staff and other users is reduced, and through visual output, the efficiency is greatly improved. A doctor can better understand the illness state and the blood vessel state of a patient, and the method is very important for analysis and diagnosis.
Owner:SHENYANG LIGONG UNIV

Slope tile lifting mahjong machine

The utility model discloses a slope tile lifting mahjong machine which comprises a main machine frame and a panel arranged on the top face of the main machine frame, a tile outlet is formed in the panel, a tile lifting assembly is arranged on the main machine frame, and the tile lifting assembly comprises a slope tile lifting supporting plate hinged to the tile outlet. A tile pushing assembly used for pushing tile piers in the tile storage groove to the slope tile lifting supporting plate is arranged in the main machine frame. A dealing sequence storage area adjacent to the card outlet is formed on the panel, and at least one sensing module is arranged in the dealing sequence storage area to monitor whether a dealing sequence reaches the panel or not; the sensing module, the tile lifting assembly and the tile pushing assembly are all connected with a control module. In the whole tile lifting process, the slope tile lifting supporting plate only descends and ascends once, the middle pause time of the tile pushing assembly is short, the tile pushing assembly can immediately recover to work as long as a player moves away the tile dealing sequence, the time needed for tile feeding and tile lifting is saved, and the service life of the tile lifting assembly is prolonged.
Owner:HANGZHOU TIANJI TECHNOLOGY CO LTD

Slope tile playing mahjong machine and tile feeding mechanism thereof

The utility model discloses a mahjong machine capable of playing tiles on a slope and a tile feeding mechanism thereof, the tile feeding mechanism comprises a rack, a tile storage channel is arranged in the rack, the tile storage channel is bent in an arc shape, and the bending angle of the tile storage channel is larger than 180 degrees; the card pushing assembly is used for pushing the card dealing sequence and the card touching sequence in the card storage channel in sequence; the card lifting assembly is used for lifting the card dealing sequence and the card touching sequence to the panel in sequence; and the mahjong pushing assembly and the mahjong lifting assembly are connected with the control assembly. When the dealing sequence enters the dealing channel, the dealing assembly intervenes in the dealing block sequence, when the dealing sequence also enters the dealing channel, the dealing sequence is lifted to the panel by the dealing assembly and the dealing lifting assembly, the dealing assembly rotates to a starting point to push the dealing block sequence, and when the dealing sequence is taken away, the dealing block sequence enters the dealing block sequence by the dealing assembly and the dealing lifting assembly. And the tile lifting assembly lifts the tile sequence to the panel. The playing method of the eight-opening machine is implemented in the four-opening slope playing mahjong machine by leading the tile pushing assembly to intervene in advance, so that the interestingness of the mahjong machine is enhanced.
Owner:HANGZHOU TIANJI TECHNOLOGY CO LTD

Tabletop curling top toy

ActiveCN224442082UVersatileHigh playability
A table curling top toy, comprising a curling body and a plug-in; the curling body comprises an upper shell and a lower shell, the lower shell is provided with a rolling ball assembly, the lower end surface of the upper shell is provided with a first connecting column and the lower shell is detachably connected, a supporting frame is arranged between the upper shell and the lower shell, the supporting frame is sleeved on the first connecting column and rotates along the circumference thereof, at least two insertion slots are uniformly distributed on the side wall of the supporting frame in the circumferential direction, and the plug-in is inserted into the insertion slot. When the curling body slides, the supporting frame can also be rotated to drive the plug-in to rotate, forming a gyro effect. After the above structure is adopted, the table curling game attribute is added on the basis of the table curling game attribute, and compared with the prior art, the product function is more abundant, the product playability is improved, and the audience is wider.
Owner:ZHEJIANG WANKA ANIMATION CO LTD

Compound herbal extruded body, method of manufacture, moxa sticks, incense or herbal cigarettes

The application discloses a compound herbal extruded body, a preparation method, moxa sticks, incense or herbal cigarettes, which comprise the following steps: adopting compound herbal raw materials; crushing the compound herbal raw materials and processing the crushed compound herbal raw materials through a puffing equipment; and preparing the compound herbal extruded body with a porous columnar structure. The compound herbal extruded body is prepared by the above preparation method. The moxa sticks, incense or herbal cigarettes are made of the compound herbal extruded body. The application applies the prescription of traditional Chinese medicine material compatibility and plant manufacturing extruded body material, utilizes advanced test technology, and makes the extruded body through pharmacological experiment and advanced puffing equipment and production technology. The extruded body or the porous tubular extruded body is used to make the compound herbal moxa, incense or cigarettes. In actual use, the application meets the demand of moxa sticks, incense and cigarettes, achieves the practical value and market value of multiple product varieties, wide audience and wide use scenarios.
Owner:SHANGHAI YICANG TRADING CO LTD

Composite door and window profile

The invention provides a composite door and window sectional material. The composite door and window sectional material comprises a plastic sectional material, a glass fiber reinforced plastic lining and a light heat preservation material. Wherein the plastic section bar is an outermost frame structure of the composite door and window section bar, the glass fiber reinforced plastic lining is arranged on the inner side of the plastic section bar, and a cavity defined by the glass fiber reinforced plastic lining or the plastic section bar is filled with the light thermal insulation material. The problem of creep deformation of a traditional plastic profile is solved, the problem that the heat preservation performance is not good enough is further solved, it is guaranteed that the composite structure becomes a whole through the co-extrusion technology, the structure and the manufacturing technology are very simple, and the composite structure has good commercial value and wide commercial prospects and is worthy of application and popularization.
Owner:HUNAN VISION HOUSING IND TECH CO LTD

A black bean vinegar health composition and a preparation method thereof

PendingCN122271510AThe recipe is minimalImprove authorization rateBiotechnologyLiver and kidney
This invention discloses a black bean vinegar health-preserving composition and its preparation method, belonging to the field of health food technology. The composition consists of only two raw materials: black beans and edible vinegar, in a ratio of 40:60 to 60:40, without any excipients or additives. The preparation method includes the steps of washing black beans, cooking and cooling, sealing and soaking in vinegar solution, and bottling and preservation. This invention features a simple and novel formula, high safety, low production cost, and suitability for large-scale production. It possesses health-preserving effects such as promoting hair growth and blackening, nourishing the liver and kidneys, promoting bowel movements, and assisting in regulating blood pressure and blood lipids. Furthermore, it enjoys extensive patent protection and has broad market application prospects.
Owner:何培栋

Eight-opening mahjong machine and tile feeding method thereof

The invention discloses an eight-opening mahjong machine and a tile feeding method thereof. The tile feeding method comprises the following steps: S1, acquiring a tile feeding demand of a user; s2, according to the card loading demand, determining a card loading mode; the tile feeding mode comprises an eight-opening tile feeding mode and a four-opening tile feeding mode, the eight-opening tile feeding mode is to feed tiles through eight tile lifting openings of the mahjong machine, and the four-opening tile feeding mode is to feed tiles through four tile lifting openings of the mahjong machine. According to the tile feeding method, which tile feeding mode is adopted by the mahjong machine can be determined according to the requirements of a user, and in the eight-opening tile feeding mode, the mahjong machine adopts eight tile lifting openings to feed tiles, namely, a traditional eight-opening machine playing method is adopted; and in the four-opening tile feeding mode, the mahjong machine feeds the tiles only through four tile lifting openings, and a traditional four-opening machine playing method and a new eight-opening machine playing method can be carried out at the moment, so that one mahjong machine can be compatible with multiple playing methods, the audience range is wider, and the tile playing preferences of different crowds can be met.
Owner:HANGZHOU TIANJI TECHNOLOGY CO LTD

Multifunctional hanging belt

The utility model provides a multifunctional hanging belt which comprises a hanging belt body, the hanging belt body is sequentially provided with a first fixing buckle, a second fixing buckle, a first movable inserting buckle, a third fixing buckle, a second movable inserting buckle, a third movable inserting buckle, a fourth fixing buckle and a first fixing inserting buckle, and the two ends of the hanging belt body are fixedly connected with a first woven belt and a second woven belt downwards respectively. The woven belt I and the woven belt II are respectively provided with a plurality of connecting belts, and hanging buckles are respectively arranged at the bottom ends of the woven belt I and the woven belt II. When the hanging belt is used, the first fixing buckle and the first fixing inserting buckle, the second fixing buckle and the first movable inserting buckle, the third fixing buckle and the second movable inserting buckle, and the fourth fixing buckle and the third movable inserting buckle form four spaces capable of being hung independently, the hanging belt can be freely folded and hung everywhere when a user goes out, and the hanging belt is multipurpose, adapts to various use scenes and is convenient to use. The device has the characteristics of high adaptability, convenience in operation, portability and durability; and the size can be flexibly adjusted according to the size of the article, and the article can be easily taken without influencing the hanging of other articles.
Owner:QUANZHOU NORMAL UNIV

Method for extracting elastin peptide from jellyfish

The invention relates to a method for extracting elastin peptide from jellyfish. The method comprises the following steps: S1, washing fresh jellyfish with clear water to remove impurities or soaking and salting the jellyfish with cold water containing citric acid / acetic acid to desalt; cutting into small blocks for later use; s2, mixing the jellyfish with a sodium hydroxide solution with the pH value of more than or equal to 11.5, carrying out pressure maintaining and shearing treatment by using a high-pressure shearing machine, centrifuging, and retaining precipitates; s3, mixing the precipitate with pure water, adjusting the pH value to be less than or equal to 1.5 by using hydrochloric acid, reacting for 1-4 hours, and centrifuging to reserve the precipitate; s4, the precipitate is mixed with sodium chloride saline water, the concentration of the sodium chloride saline water is 0.8-1.5 M, a reaction is conducted for 1-4 h, centrifugation is conducted, and the precipitate is reserved; s5, mixing the precipitate with pure water, adjusting the pH value to 6.8-7.4, adding elastinase for enzymolysis, performing high-speed centrifugation, and retaining the precipitate; and S6, collecting the precipitate to obtain the jellyfish elastin peptide. The jellyfish is used as a raw material and has the advantages in the aspects of raw material cost, availability, pretreatment and the like.
Owner:YUANHAI BIOTECH (DALIAN) CO LTD

Slope tile lifting mahjong machine and tile feeding method thereof

The invention discloses a slope tile lifting mahjong machine and a tile feeding method thereof. The tile feeding method comprises the following steps: (1) descending a slope tile lifting support plate to present a dealing sequence; (2) judging whether the dealing sequence completely climbs on a panel or not, and if so, pausing to present a card touching sequence; (3) judging whether the dealing sequence is taken away or not, and if so, entering the next step; and (4) judging whether the tile-touching sequence completely climbs on the slope tile-lifting supporting plate or not, if not, continuing to present the tile-touching sequence, and if so, lifting the slope tile-lifting supporting plate. According to the invention, an included angle is formed between the slope tile lifting support plate and the panel when the slope tile lifting support plate descends, so that the mahjong tiles on the panel are naturally separated from the mahjong tiles retained on the slope tile lifting support plate; in this way, the slope card lifting supporting plate can be directly used for achieving multi-time presentation of the card dealing sequence and the card touching sequence in the one-time descending and ascending process, the card feeding process is simple, convenient and efficient, and the user experience feeling is good; abrasion to the tile feeding mechanism is greatly reduced, and the manufacturing cost and the maintenance cost are greatly reduced.
Owner:HANGZHOU TIANJI TECHNOLOGY CO LTD