72results about How to "Eliminates pungent odors" patented technology

The present invention provides a microbial fermented composite antibiotic-free feed containing natural antibacterial components. The feed comprises a fermented product based on the united segmented fermentation of aerobic-anaerobic composite strains, composite natural antibacterial components, a non-plant source protein / polypeptide compound nutrient supplement agent, and an additive comprising atleast a soybean protein amino acid / polypeptide compound chelate. The composite strains comprises at least lactic acid bacteria, bacillus subtilis, yeast selected from candida utilis or saccharomyces cerevisiae, and enterococcus faecalis. The fermented product based on the united segmented fermentation is prepared by carrying out secondary fermentation on fermentation raw materials through the aerobic-anaerobic composite strains. The combination of the microbial fermented feed and the natural antibacterial components is beneficial to the balance of intestinal flora of animals, and can prevent the dysbacteriosis of digestive tracts, improve the immunity functions of animal organisms, reduce or replace the use of feed antibiotics, and significantly improve the digestion and absorption efficiency of the feed and the meat quality of animals.

The invention discloses a Maca candy, and relates to a formula of a functional candy and a production method thereof. The Maca candy consists of the components in percentage by weight: 5 to 70 percent of Maca powder and / or Maca extract and the balance of candy base stock. A proper amount of the Maca powder or the Maca extract is used in candy so as to effectively remove the pungent smell of the Maca and improve the taste of the Maca, so that the smell of the Maca per se is more pure and mild, the flavor of the candy is enriched, the Maca source is fully used, and meanwhile, when people chew the candy, the Maca candy can supplement a plurality of nutrition constituents and microelements for the people, also supplement nutrient matters for a brain of the people, supplement energy, improve internal secretion of human body, and improve the sexual ability of the people; and after being eaten, the Maca candy satisfies the flavor of the people and brings a joyful mood and a full spirit to the people, and also adjusts the sub-health state of the human body and releases the pressure.

The invention relates to a polyurethane top-coat paint and a preparation method thereof, and particularly relates to a polyurethane matt wearable top-coat paint for removing an odor and a preparation method thereof. The polyurethane matt wearable top-coat paint can be applied to office suite furniture, and belongs to the field of a household decorative coating. The polyurethane matt wearable top-coat paint for removing the odor is prepared from a primary agent, a curing agent and a diluent according to the ratio of (1-1.4):(0.5-0.7):(0.7-1.2), wherein the primary agent comprises the following components in parts by weight: 68-80 parts of alkyd resin, 5-10 parts of vinyl chloride-acetate copolymer, 0.5-1.8 parts of dispersant, 0.3-1.5 parts of flatting agent, 0.1-0.5 parts of defoamer, 2-6 parts of anti-settling agent, 2-8 parts of glass powder, 0.5-1 part of wax powder, 2-7 parts of matte powder and 3-8 parts of mixed environment-friendly solvent. The prepared polyurethane matt wearable top-coat paint for removing the odor is not only low in odor after construction, but also good in scratch resistance performance of the film, good in abrasive resistance, and good in environmental performance.

The invention discloses an environmentally-friendly and long-lasting fire-retarding treatment method for all-cotton knitted fabrics, which adopts a processing flow comprising padding, low-temperature drying, high-temperature drying, washing with water, drying and softening and deodorizing. In the invention, an Aflammit KWB fire retardant is used, processing is performed on the conventional dyeing and finishing equipment, and the products have higher fire-retarding performance due to the combination of the fire retardant and cotton fibers by covalent bonds and offer a soft handfeel and are more in accordance with an environment protection requirement. The products produced by the process offer a soft handfeel, the fire-retarding effect after 50 times of washing with water reaches American CFR1615 standards, the formaldehyde content is lower than 20ppm, the products are more environmentally-friendly and have no irritating smell.

The invention relates to a kind of catalyst that can eliminate ozone, especially photocatalytic eliminate ozone catalyst. Au is the active component of the catalyst, activity carrier is the TiO2, the mass ratio of the gold and titanium dioxide is 1:100-1: 200, the TiO2 activity carrier is powder, the average size is 5-50nm, TiO2 crystal is anatase, rutile, plate perovskite or mixed crystal. This catalyst has good performance for photocatalytic eliminate ozone, the carrier that requirements are simple, less the amount of catalyst, especially used in indoor air purification means for elimination of ozone, and the preparation is simple, cost is greatly reduced, suitable for industrial production.

The invention relates to a low-odor polyurethane open white primer and a preparation method thereof. The low-odor polyurethane open white primer is formed by mixing a main agent, a curing agent and a diluent by a mass ratio of (1-1.4):(0.5-0.7):(0.6-1), wherein the main agent, the curing agent and the diluents are respectively prepared from the following components in part by weight: the main agent comprises the following components in part by weight: 45-55 parts of alkyd resin, 0.1-0.5 part of a dispersing agent, 0.1-0.5 part of a defoaming agent, 3-7 parts of zinc powder, 0.2-0.6 part of bentonite, 2-7 parts of calcium carbonate, 18-25 parts of titanium dioxide, 2-7 parts of talcum powder, 10-15 parts of a mixed environment-friendly solvent, and 0.1-0.3 part of a drier. The prepared low-odor polyurethane open white primer has low odor after construction, a primer film can permeate on wood patterns well, and the covering capability and the environment protection property are good.

The invention discloses a direct-fired auto-warming biomass gasifier, which comprises a furnace body of an updraught gasifier in the prior art, an ash outlet, a discharge chimney and a fan, and is characterized in that: a cooking range is arranged on the upper part of a hearth and is integrated with the furnace body; an auto-warming pyrolysis combustion cooking range and a closed pot holder are arranged; a fuel gas releasing tube and a fuel gas releasing valve leading to the discharge chimney are arranged on one side of the top part of the hearth; one side of the upper part in the furnace body is provided with a charging hole; and a manually rotated ash dispelling, blanking and air intake device is arranged at the bottom of the hearth. The direct-fired auto-warming biomass gasifier has the advantages that: pipelines and a stove eye are not blocked caused by condensation and deposition any more; thermal efficiency is improved; pungent smell is removed; fuel does not overflow any more when a cover is uncovered to feed materials; indoor air is not polluted; the gasifier is not burnt out and fire is not cut off any more; ash is easily dispelled and the materials fall easily; and normal combustion and gas generation are guaranteed. The direct-fired auto-warming biomass gasifier is more suitable for popularization and application in energy conservation and emission reduction and construction of new rural communities.

The invention discloses a drawplate-bearing electrostatic air purifier which comprises a grip, a clamping groove, silencing cotton, a buckle, an air refreshing agent, a drawplate, a tongue, a groove, a fixed block and a nonskid mat, wherein the buckle is arranged on the bottom end of a bottle opening; the bottle opening is connected with a bottle body through the buckle; the grip is arranged on the outer wall of the bottle body; an electrostatic adsorption device is fixed to the inner wall of the bottle body through the clamping groove; an activated carbon filter screen is fixed to the inner wall of the bottle opening through a first locating piece; the outer wall of the bottle body is provided with the drawplate; the inner walls of the bottle opening and bottle body are respectively provided with the silencing cotton; the surface of the first locating piece is provided with the air refreshing agent; and the bottom of a base is provided with the nonskid mat. The air purifier is convenient for cleaning and maintenance, is simple for assembling and disassembling the internal and external structures, has low noise in the working process, can effectively remove pungent odor caused by ozone, has the advantages of beautiful appearance and high base fixing capacity, and is convenient for the user to take and transport.

The invention discloses a plant health-care beverage containing garlic and a preparation method of the plant health-care beverage, and relates to the technical field of food making. A feed solution which comprises a garlic extracting solution, a perilla frutescens extracting solution, a radix glycyrrhizae extracting solution, a tea extracting solution and a stevia rebaudiana extracting solution isblended with water, is homogenized, filtered and sterilized and then is packed to obtain the plant health-care beverage containing the garlic. In a preparation process, the garlic is subjected to microwave enzyme deactivation, reaction of alliin and enzyme to generate allicin is relieved, the alliin is retained effectively, and the pungent smell of the garlic is relieved. Effective constituents in radix glycyrrhizae and tea leaves effectively decompose sulfide generated by decomposition of the alliin, and the pungent smell is eliminated; and the particular exotic fragrance of perilla frutescens can cover the odor of the garlic, and meanwhile, the perilla frutescens has effects of promoting appetite and removing toxic substances; and stevia rebaudiana improves sweetness and does not have heat. The raw materials of the beverage are pure plants, additives do not need to be added, and the plant health-care beverage is green and healthful; and meanwhile, the beverage tastes unique, has rich fragrance, is low in cost, and has health-care effects of clearing away fire and removing toxic substances, removing greasy feeling, lowering blood pressure and preventing diarrhea.

The invention discloses low-odor stainless steel cold-rolled sheet rolling oil which is prepared from, by weight, 90-95% of hydrofining mineral oil, 3-8% of polyol ester oily agents, 0.5-3% of extremepressure agents, 0.01-0.5% of anti-rust agents and 0.05-1% of antioxidants. The rolling oil meets the requirements of lubrication, friction reduction and board cleanliness in the rolling process, andovercomes the shortcoming that traditional rolling oil has a certain irritating odor, is harmful to environments and affects employees' health.

The invention discloses a Humulus lupulus extract feed additive and a preparation method thereof. The Humulus lupulusHumulus lupulus extract feed additive is prepared from the following components in parts by weight: 20-50 parts of Humulus lupulus extract, 20-30 parts of liquorice powder and 20-60 parts of corncob powder. Compared with the prior art, the invention has the following advantages: 1,supercritical CO2 extraction is adopted to effectively remove pungent smell of Humulus lupulus and maintain effective contents to the hilt at the same time, wherein beta acid and alpha acid in the Humulus lupulus extract are main active substances, and liquorice, with harmonic function, can be compatible with the Humulus lupulus extract to improve the efficiency of Humulus lupulus; 2, the feed additive provided by the invention is solid, thereby having the advantages of being convenient to store, transport and add; 3, the product provided by the invention can improve the organism health condition, improve the immunity of the organism, reduce the feed conversion ratio, and has importance to development of animal husbandry, promotes the coming of 'antibiotic reduction, zero antibiotic'; besides, the application range of Humulus lupulus is widened, and the feed additive has important significance to healthy development of Humulus lupulus planting industry.

The invention provides a fermented wine and a preparation method thereof, and relates to the technical field of food processing. The fermented wine is prepared from the following raw materials in parts by weight: 6 to 12 parts of black fungi, 5 to 10 parts of rhizoma dioscoreae zingiberensis, 7 to 14 parts of fermented lily juice, 6 to 12 parts of fructus lycii, 3 to 8 parts of dried tangerine peel, and 5 to 10 parts of wine's distiller. The fermented wine has the advantages that the rich and full nutrients are contained; by adopting the special formula and the special preparation method, theeffect and mouth feel of each food material are furthest realized; by adding Chinese herbal medicines into a health-care wine, the mouth feel is good, the health-care function of strengthening body isrealized, the safety and reliability effects are realized, and any toxic or side effect is avoided.

The invention discloses an environment-friendly activated carbon waste gas disposal box. The environment-friendly activated carbon waste gas disposal box includes a disposal box body, a housing positioned on the outer surface of the disposal box body, a control panel positioned on the surface of the housing and an activated carbon filtering net contained in the disposal box body; the housing includes a groove, a clamping groove contained in the groove, an information processor positioned on the right side of the clamping groove, a purifying cavity positioned in the lower portion of the information processor, a pipe positioned on the left side of the purifying cavity and a rubber pad positioned at the bottom of the housing. The environment-friendly activated carbon waste gas disposal box can remove irritant smell in waste gas, absorption holes arrayed periodically can absorb the waste gas which is purified preliminarily, and the waste gas can be completely absorbed by activated carbon particles adhering the absorption holes. Moreover, since the absorption holes are arrayed periodically, the waste gas can be prevented from drifting all around and can be fully absorbed, and the practicability of the disposal box is improved.

The invention relates to an artificial stone and a preparation method thereof, in particular to a geopolymer crack-resisting artificial stone and a preparation method thereof. The geopolymer crack-resisting artificial stone is prepared from the following raw material components in parts by weight: 100 parts of nickel iron slag, 35 to 50 parts of a geopolymer, 7 to 15 parts of water, 0.35 to 1.0 part of a water reducing agent, 0.07 to 0.1 part of a plasticizer, 0.7 to 1.5 parts of an anti-cracking agent and 0.01 to 2 parts of pigment. The preparation method of the geopolymer crack-resisting artificial stone comprises the following steps: firstly, stirring and mixing raw materials; secondly, carrying out compression moulding; thirdly, curing; fourthly, polishing. The geopolymer crack-resisting artificial stone disclosed by the invention has the advantages of better acid and alkali resistance characteristics, capability of being used outdoors, good weather resistance and relatively high breaking strength; the preparation method of the geopolymer crack-resisting artificial stone disclosed by the invention adopts simple process steps and strictly controls process parameters of all the steps, so that the final quality of a finished artificial stone product is ensured.

The invention provides a preparation method of a high-concentration essence master batch, relates to a master batch capable of continuously releasing fragrance, in particular to a preparation method of a high-concentration essence master batch, and belongs to the field of high polymer material processing. The perfume is prepared from the following raw materials in parts by weight: 50-70 parts of carrier resin, 10-20 parts of a flavor enhancer and 20-30 parts of a flavor enhancing absorbent. The essence master batch prepared by the invention can be applied to various thermoplastic resin carriers; compatibility with substrate, the preparation method is simple, the mechanical property of the material is not influenced, the prepared material has lasting pure fragrance and is environmentally friendly and non-toxic, the service life of a fragrant plastic product is prolonged, the process steps in the prior art are simplified under the condition that the quality is not influenced, meanwhile,the process flow in the prior art is optimized, the perfuming effect is better, and the fragrance preservation time is long.

The present invention discloses maca fruit and vegetable drink and a preparation method thereof, and belongs to the technical filed of fruit and vegetable drink processing. The provided maca fruit and vegetable drink contains 30 parts of maca extract solution, 40 parts of apple juice, 20 parts of tomato juice, 8 parts of white granulated sugar, 0.18 part of citric acid, 0.08 part of essence and 1.74 parts of pure water. A pH of the drink is 3.2-3.4. At the same time, the present invention also provides a maca fruit and vegetable drink preparation method. The provided method uses a dual-frequency ultrasound alternately enhanced supercritical fluid extraction technology to extract the active ingredients in the maca, the drink is high in extraction rate, the nutrients are not easily be damaged, and the drink is high in purity, free of solvent residues, free of pollutions, etc.

The invention discloses a heat shrink tube for an automobile, and a preparation method thereof. The heat shrink tube for the automobile is characterized by comprising the following raw materials in parts by weight: 25 to 30 parts of polyethylene-vinyl acetate, 25 to 30 parts of polyethylene, 10 to 20 parts of ethylene-propylene-diene monomer (EPDM), 20 to 30 parts of decabromodiphenyl ethane, 5 to 10 parts of antimonous oxide, 0 to 1 part of an antioxidant, and 0 to 1 part of a lubricating agent. The heat shrink tube for the automobile has the following beneficial effects: the new raw materials are added in the formula and the original proportion is adjusted, so that under the condition of not changing the original physical performance, the flame-retardant level is greatly increased, and the pungent smell is eliminated.

The invention discloses water-based environment-friendly radiator paint and a preparing method thereof. The water-based environment-friendly radiator paint comprises, by weight, 20 parts to 25 parts of water-based self-crosslinking acrylate emulsion, 10 parts to 15 parts of polyurethane emulsion, 6 parts to 8 parts of passivation liquid, 5 parts to 7 parts of acrylic-silicone emulsion, 4 parts to 6 parts of chitosan, 5 parts to 7 parts of adhesion pigment, 0.6 part to 0.8 part of defoaming agents, 0.03 part to 0.05 part of flatting agents, 12 parts to 15 parts of plant water-based color paste, 0.4 part to 0.6 part of cellulose acetate, 0.5 g / L to 0.7 g / L of penetrating agents JFC, 0.2 part to 0.5 part of pentachlorodiphenyl and 100 parts of deionized water. By means of the water-based environment-friendly radiator paint and the preparing method, the water paint spraying film forming speed is increased, and a passive film is good in corrosion resistance, low in porosity, rich in plant ingredient, nontoxic, environmentally friendly and low in smell, and has the certain antibacterial effect and the certain fireproof performance; the surface adhesive force of the radiator paint is improved, the luster is bright, the crack resistance is improved, the workpiece bonding performance of the environment-friendly radiator paint can be improved, the effect that repeated adhesion of the surface of the radiator paint can be avoided after the radiator paint is dried is achieved, and the excellent water resistance is achieved.

The invention discloses a processing method of buckwheat health-care noodles for protecting the liver. The processing method comprises the following steps of firstly crushing fresh garlic, and then performing fermentation; soaking buckwheat, and performing puffing treatment; and finally, mixing fermented garlic pulp with puffed buckwheat flour, wheat flour and other auxiliary materials, performing blending to obtain dough, performing cutting to obtain strips, and performing drying so as to obtain finished products of the noodles. The noodles prepared by the method disclosed by the invention are rich in nutrition, smooth in mouth feel and rich in dietary fibers and garlic polysaccharide, and have good efficacy of protecting the liver and controlling postprandial blood sugar.

The invention discloses an environment-friendly wood paint and a preparation method thereof. The environment-friendly wood paint is prepared from the following raw materials in parts by weight: 30-40parts of rosin-modified hydroxyl-terminated hyperbranched polyurethane, 10-20 parts of castor oil, 3-5 parts of chloroprene rubber emulsion, 4-6 parts of carboxyl-modified beta-cyclodextrin, 6-10 parts of sodium tetraborate, 10-15 parts of porous rare earth oxide, 5-10 parts of an alcohol solvent, 0.8-1.2 parts of an emulsifier, 1-2 parts of a leveling agent, 0.7-1 part of an antifoaming agent, 1-2 parts of a dispersant and 25-55 parts of water. The invention also provides a preparation method of the environment-friendly wood paint. The environment-friendly wood paint is better in waterproofness and wear resistance, faster in paint film drying, more excellent in dirt adhesion resistance, scratch resistance and weather resistance, and safer and more environment-friendly to use.

The invention discloses a solid-liquid mixed type foam stabilizer and a preparation method thereof. The solid-liquid mixed type foam stabilizer is prepared from emulsion and solid particles, wherein the emulsion is potassium stearate emulsion and / or sodium stearate emulsion, and the solid particles are calcium carbonate particles with stearic acid molecules chemically grafted on the surfaces. The solid-liquid mixed type foam stabilizer is prepared by reacting raw materials containing stearic acid, sodium hydroxide and / or potassium hydroxide and calcium carbonate particles. The preparation method comprises the following steps that an organic solvent, stearic acid and calcium carbonate particles are added into a reaction kettle, the temperature is adjusted to 40-65 DEG C, and mixing and stirring are carried out; an aqueous alkali solution is continuously dropwise added, and reacting is carried out for 2-4 hours after dropwise adding is finished; after the reaction is finished, a sufficient amount of water is supplemented into the reaction kettle; and shearing and emulsifying are carried out at high speed to obtain a final product. According to the solid-liquid mixed foam stabilizer, the problem of poor foam stabilizing performance of traditional sodium soap and potassium soap emulsions is solved, the foam stabilizing performance of the obtained mixed foam stabilizer is significantly improved, and the mixed foam stabilizer is better than traditional ammonium stearate emulsions.

The invention discloses maca tablets. The maca tablets are prepared from, by weight, 94-96 parts of maca powder, 2-3 parts of xylitol and 2-3 parts of maltodextrin. The amount of the materials used for the maca tablets is small, and the maca tablets are simple to prepare, has the effects of quickly replenishing physical strength and eliminating fatigue and can enhance a sexual function and fertility through long-term taking.

The invention provides a deodorizing agent for regenerated rubber as well as a preparation method and application thereof. The deodorizing agent for the regenerated rubber provided by the invention comprises the following components in parts by mass: 60 to 70 parts of ferrous sulfate, 15 to 25 parts of sodium dodecyl benzene sulfonate, 5 to 15 parts of benzyl benzoate, 3 to 7 parts of N,N-dimethylformamide, and 95 to 105 parts of calcined pottery clay. By adopting the deodorizing agent provided by the invention, the pungent smell produced in the production and application process of the regenerated rubber can be removed.

The invention relates to the field of processing of food and in particular discloses noodles with garlic and onion and a preparation method of the noodles. The noodles with the garlic and the onion are prepared from the following raw materials in parts by weight: 100 parts of wheat foul and 1-40 parts of garlic and onion pulp, wherein the garlic and onion pulp is prepared by screening, distilling, crushing, carrying out enzymolysis and stirring and mixing at high speed. The noodles with the garlic and the onion have high nutritive value, and are convenient, quick, tasty and delicious; the pungent smell of the garlic and the onion is neutralized; the complete rate of the nutritional ingredients of the garlic and the onion is increased; the additional value of the noodles is improved.

The invention discloses tea saponin facial cleansing powder which is prepared from, by mass, 40-60% of tea saponin, 0.5-2.5% of powdery activated carbon, 5-15% of powdery natural high-molecular matter, 8-18% of hydroxypropyl methyl cellulose and 16-35% of powdery humectant .The invention further discloses a preparation method and a use method of the tea saponin facial cleansing powder .Tea saponin serves as the main raw material, other components are added, and the tea saponin facial cleansing powder is prepared through mixing .Performance of the facial cleansing powder is stable due to the whole component matching ratio, compared with tea saponin, the probability of dampness is greatly reduced, liquidity is greatly improved, irritation of smell is reduced, and the tea saponin facial cleansing powder can achieve better facial cleansing and moisturizing effects and user experience.

The invention relates to the technical field of chemical smelting, and discloses a flue gas collection and purification device for cast pipe annealing furnaces in chemical smelting. An upper heat-absorbing pipe is fixedly installed on the top of the furnace, and the top of the upper heat-absorbing pipe is connected with a first water inlet pipe, and the right side of the first water inlet pipe is connected with a hot water communication pipe located on the front surface of the annealing furnace. The left side of the hot water communication pipe communicates with a lower heat absorbing pipe located at the bottom of the annealing furnace, the bottom of the lower heat absorbing pipe communicates with a first water outlet pipe, and the bottom of the first water outlet pipe communicates with a water storage tank. A slow cooling section is fixedly installed on the left side of the annealing furnace. The flue gas collection and purification device for chemical smelting cast tube annealing furnace can effectively ensure that the flue gas discharged from the heat preservation section can be effectively filtered and purified, and effectively reduce the impact of the flue gas on the human body and the air.

The invention discloses a black onion juice dietary therapy product for regulating three highs and a preparation method thereof. The preparation method comprises: (1) pretreatment of raw materials; (2) a stage of sterilization; (3) a stage of ripening; (4) a stage of fermentation; (5) supercritical fluid technical extraction; and (6) a step of squeezing extracting raw materials in the step (5), then performing filtration to remove solid maters to obtain liquid, mixing the obtained liquid with an extract in the step (5), and performing concentration and sterilization to obtain the black onion juice dietary therapy product. The black onion juice provided by the invention contains rich quercetin and polyphenols, can be drunk by patients with the three highs for a long time, does not have a side effect, and achieves a significant effect in the aspect of lowering the three highs.

The invention belongs to the technical field of high polymer material production, and particularly discloses plastic color master batch production equipment, which comprises an inner cylinder body, anouter cylinder body, a mounting base, a mixing unit and a controller. The inner cylinder body is fixedly arranged on the mounting base, and the mounting base is provided with a discharging pipe; theouter cylinder body is arranged on the outer wall of the inner cylinder body through a pin, the outer cylinder body is twenty centimeters higher than the inner cylinder body, and feeding pipes are symmetrically arranged at the top of the outer cylinder body; the mixing unit is internally located in the inner cylinder body, and comprises a forward and reverse motor, a lead screw I, a fixed block, adeflector rod, a mounting plate and a sliding block I; through the function of the mixing unit, materials of the inner cylinder body are fully mixed, through the function of the forward and reverse motor, the fixed block is driven to move up and down in the vertical direction, thus the deflector rod presses the materials input into the inner cylinder body to reduce the size of the input materials, uniform mixing between subsequent materials is convenient, and thus the mixing effect of the materials is improved.

The invention provides a composite foaming agent for bubble water and a preparation method thereof. The formula comprises the following components by weight: 20-30 parts of a betaine type ampholytic surfactant, 40-60 parts of alkyl glucoside and 10-20 parts of a penetrant JFC. The preparation method includes: adding alkyl glucoside, the betaine type ampholytic surfactant and the penetrant JFC intoa reaction kettle, and stirring the substances evenly to obtain a finished product. The product can be used in production of bubble water, can improve the product bubble number, improve the low-temperature precipitation performance and eliminate the pungent smell, also can enhance the gorgeous color of bubbles and prolong the existence time of bubbles in the air, and the process is simple, has noneed for heating and has strong operability.