1479results about How to "Easy to industrialize" patented technology

The present invention provides a method for constructing a universal LED bulb, a snap ring structured LED bulb and a lamp. The constructing method comprises: supporting an optical engine core member of the LED bulb in the lens snap ring (8) using a lens snap ring (8) as a supporting main body, using an inner snap ring (81) provided on the inner side of a light distribution optical lens (7) in the optical engine core member as an auxiliary supporting structure, and further using the inner snap ring (81) as an installation base of an optical engine module (4) and a heat conductive bracket (3) or an installation base of an LED bulb radiator (103); the optical engine core member of the LED bulb is composed of the heat conductive bracket (3), the optical engine module (4), the inner snap ring (81) and the light distribution optical lens (7).

The invention discloses a preparation method of a graphene material. The preparation method comprises the following steps of: with graphite carbon as a raw material, adding potassium hypermanganate and concentrated sulfuric acid in batches in different stages to control an oxidation process of graphite; adjusting the pH value of the oxidized solution to obtain graphene oxide colloidal dispersing solutions (GOS) with different concentrations; dropwise adding the GOS on the surface of a carrier or spreading out the GOS on a non-intersolubility liquid/liquid interface and drawing into a grapheneoxide thin-film (GOF); carrying out high-speed centrifugation and drying treatment on the GOS to obtain graphene oxide solid powder (GOP); reducing the GOS by selecting an appropriate reducing agent,and centrifugally drying to obtain reduced graphene solid powder (GRP); dispersing a proper amount of GRP in an organic solvent to prepare a reduced graphene oxide colloidal dispersing solution (GRS); and dropwise adding the GRS on the surface of the carrier or spreading out on the non-intersolubility liquid/liquid interface and drawing into the reduced graphene thin-film (GRF). Various graphene materials prepared by the invention are easy to mutually transform; and the concentration of the colloidal solution and the thickness of the thin-film can be controlled in a certain range.

The invention belongs to the field of material science and particularly relates to a graphene oxide/cellulose compound material as well as a preparation method and application of the material. The compound material is prepared by mixing graphene oxide suspension and alkaline solution of cellulose, and forming a compound structure of the graphene oxide and the cellulose under the action of mechanical stirring, shearing, ultrasonic or the like. In the preparation method, raw materials are cheap and easy to obtain, a water system is simple and free of pollution, equipment is simple and low in cost, and the industrial preparation is easy to realize; and the prepared compound material has the properties of fiber and the graphene oxide and is widely applied.

The invention discloses a platinum aluminium oxide series catalyst for preparing propylene by propane dehydrogenation and a preparation method of the catalyst. The catalyst is as shown in a formula PtSnX1X2/Al2O3, wherein in the formula, the content of noble metal Pt is 0.25%-0.35%, the content of metal Sn is 0.1%-3.5%, the total contents of auxiliaries X1 and X2 are 0.5%-3%, and X1 and X2 are selected from one of K, Ga, Zr, Cu, Mg, Zn, Ba, La, Y, Tm, Fe, Na, Cl, Zn, Ce, Sc and Sb. The platinum aluminium oxide series catalyst provided by the invention has the advantages that propylene dehydrogenation is catalyzed by adopting the catalyst at the reaction temperature of 590-650 DEG C at the pressure of less than 0.25Mpa, so as to obtain stable propane conversion rate and propylene selectivity greater than 95.8% are obtained; the single service life of the catalyst is long, the noble metals are not lost, and the catalyzing property of the catalyst after regeneration is good.

The invention discloses a recycling method of high-salinity wastewater. Sodium sulfate and sodium chloride are recycled through three steps of primary evaporative crystallization, cooling crystallization and secondary evaporation crystallization. According to the method disclosed by the invention, sodium sulfate and sodium chloride in the high-salinity wastewater of coal chemical industry can be effectively recycled; the method is simple and stable in technological conditions; industrial popularization is facilitated; the recycled sodium sulfate and sodium chloride meet the quality requirements of industrial products, and can be directly recovered and applied mechanically or sold as byproducts, so that the target of treating the high-salinity wastewater is reached; the requirements of the current environment-friendly situation are met; waste is changed into treasures; resource utilization of salts is achieved; and benefits of factories are improved.

A preparation method of a carbon coated vanadium sodium phosphate positive electrode material comprises the steps: with glucose as a reducing agent and a carbon source and water as a dispersant, carrying out ball milling of NH4VO3, NaH2PO4.2H2O and glucose in water, carrying out spray drying, calcining, and thus obtaining the carbon coated vanadium sodium phosphate positive electrode material. The method has the advantages of low synthesis temperature, simple steps, easily obtained raw materials, and advantageous industrialization; the obtained carbon coated vanadium sodium phosphate positive electrode material has a structure with uniform primary particles, has the particle size of 100-200 nm, and has the characteristics of short sodium ion diffusion distance, fast transmission speed, high specific surface area, high electrical conductivity and fast ion transmission and the like. The obtained carbon coated vanadium sodium phosphate positive electrode material is assembled into a battery; in a voltage scope of 2.0-3.75 V and under 1 C multiplying power, the highest first charge and discharge capacity per gram can reach 93.5 mAh*g<-1>, the capacity retention rate can be up to 97.7% after cycling for 50 circles with the 1C multiplying power, and excellent electrochemical performance is showed.

The invention discloses a preparation method of a nanofluid for improving oil recovery. The preparation method comprises the following steps: taking 2.0-4.0g of nanopowder, adding 60-80mL of deionized water to the nanopowder and carrying out ultrasonic dispersion at a room temperature for 30-60 minutes; dissolving 2.0g of a silane coupling agent in absolute ethyl alcohol; mixing the nano-base solution with the ethanol solution of the silane coupling agent in a three-neck boiling flask, heating while stirring to the range of 70 to 75 DEG C, reacting for 4-6 hours, filtering, washing by using an anhydrous solvent a plurality of times, and drying in a vacuum drying box at 60-70 DEG C for 12 hours to obtain modified nanoparticles; putting 0.1-0.5g of nanoparticles in the three-neck boiling flask, adding 200-300mL of water, heating to the range of 60-75 DEG C by use of a water bath, mixing a surfactant with PEG (Poly Ethylene Glycol), adding 100mL of mixed solution of the surfactant and the PEG, mechanically stirring for 6-8 hours, washing the stirred dispersion 2-3 times, adjusting the pH value to the range of 8-9, and adding deionized water to 1L, thereby obtaining the water-based nanofluid.

The invention relates to a method for preparing high-purity vanadium from heteropolyacid impurities in an amine extraction mode. Generally an ordinary vanadium solution is doped with impurities such as chromium, silicon, phosphorus, tungsten, molybdenum and arsenic, if acid is added into the solution, heteropolyacids such as phosphorus tungsten, phosphorus vanadium tungsten, silicon tungsten, phosphorus molybdenum tungsten, silicon molybdenum tungsten, molybdenum vanadium arsenic and tungsten arsenic can be formed, the impurities in the solution are removed by carrying out compounding synergic extraction on the heteropolyacids in the ordinary vanadium solution by using amines and a synergist so as to obtain a purified vanadium-containing raffinate, subsequently the vanadium-containing raffinate is evaporated and concentrated to be the concentration that each liter of the solution contains 40g vanadium, ammonium salt is further added into the concentrated liquid to obtain ammonium metavanadate solid, vanadium pentoxide with the purity greater than 99.9% is obtained through washing in pure water, drying and calcining in an oxygen atmosphere, the organic phase after the heteropolyacid is extracted is subjected to reverse extraction by using an alkali solution so as to form a heteropolyacid water phase, and the organic phase is recycled and circulated. The method has low requirement on equipment, and is simple to operate, key extraction agents are good in thermal stability and not sensitive in acid and alkali, and a recycling and circulating method is simple and easy to be industrialized.

The invention discloses a composite reagent for treating recycled water of printing and dyeing wastewater and an application method of the composite reagent. The composite reagent comprises the following components by weight percent: 20% to 70% of aluminum salt coagulant, 5% to 30% of iron salt coagulant, 5% to 40% of mineral material and 5% to 45% of activated carbon. The method comprises the following steps: preparing the composite reagent for treating the recycled water of the printing and dyeing wastewater into powder or an aqueous liquid in which the content of effective components accounts for 5% to 30%; regulating a pH value of effluent in a printing and dyeing wastewater biochemical system to be within 3 to 9; adding the powder or the aqueous liquid of the composite reagent into the effluent in the printing and dyeing wastewater biochemical system under the condition that the adding quantity of the effective components is between 20mg/L and 1000mg/L after the pH value of the effluent is regulated; and stirring for 0.2 to 2 hours and then standing so as to obtain the recycled water conforming to the water quality standard in textile industry. According to the method, macromolecular colloidal pollutants in the biochemical effluent of the printing and dyeing wastewater, which are difficult to degrade, can be removed by utilizing the coagulation/flocculation performance of aluminum salts and iron salts in the composite reagent; and meanwhile, soluble inert pollutants in the wastewater are removed by utilizing the adsorbability of the activated carbon and the mineral material in the composite reagent.

The invention discloses a rotary ultraviolet disinfection cabinet. The rotary ultraviolet disinfection cabinet comprises a disinfection chamber, an electric control chamber, a motor and a rectifier. A dish rack assembly and ultraviolet disinfection tubes are arranged in the disinfection chamber. The dish rack assembly is connected to the motor. The motor drives dish racks to rotate. The rotary ultraviolet disinfection cabinet has the advantages that 1, through ultraviolet disinfection, purposes of environmental protection and no objectional odor are realized; 2, power dissipation is low and electric energy is saved; 3, through rotary-type irradiation, disinfection effects are thorough and disinfection blind angles do not exist; and 4, a structure is simple and industrialization can be realized easily.

The invention relates to an anti-reflection coating and a super-hydrophobic self-cleaning anti-reflection coating and a preparation method thereof. The anti-reflection coating is formed by a SiO2 ball-shaped nanoparticle layer with the particle size of 10-100 nm, and the surface of the coating has a rough structure. The super-hydrophobic self-cleaning anti-reflection coating is formed by providing a low surface energy substance on the surface of the anti-reflection coating, and the surface of the low surface energy substance has a rough structure. The coatings are obtained by using layer-by-layer electrostatic self-assembly technique. The light transmittance of the glass coated with the super-hydrophobic self-cleaning anti-reflection coating can increase to 99.1 from 91.3%, and the single-side reflectivity of the glass can reduce lowest to 0.3%. Compared with a solar cell coated with a common glass flake, a standard mono-silicon solar cell panel coated with a glass with the super-hydrophobic self-cleaning anti-reflection coating can utilize solar energy more effectively, and the efficiency can be improved to more than 6.6%.

The invention relates to a method for preparing titanium dioxide films for a dye-sensitized solar battery, comprising the following steps: (a) titanium dioxide sol with 1-10 wt percent of titanium dioxide, 5-10nm of grain size and 10-100mg/mL of concentration and titanium dioxide powder with 5-15 wt percent of titanium dioxide and 20-40nm of grain size are uniformly ground, 80-90 wt percent of pore-forming agent is added, and the obtained 100wt percent of mixture are grounded for 0.5-2 hours; (b) titanium dioxide slurry is coated on conductive glass and is dried for 5-15 minutes at 100-130 DEG C; and (c) the conductive glass coated with the titanium dioxide slurry is sintered for 0.5-2 hours at 450-500 DEG C; by adopting the method in the invention, the process is simple, the operation is easy, the preparation period is short, thereby being beneficial to industrialization; in addition, the photoelectricity conversion efficiency of the dye-sensitized solar battery assembled by the titanium dioxide films is high by adopting the method.

The present invention discloses hydrogenating catalyst of foam metal and its preparation process and application. The hydrogenating catalyst includes foamed metal carrier and active noble metal component in effective amount supported onto the carrier, the carrier is prepared through powder metallurgical process, and the active component is supported via chemical plating process and distributed homogeneously on the port surfaces of the foamed carrier. The catalyst has the advantages of high catalytic activity, firm combination between the active component and the carrier, high stability, simple preparation process, high porosity of the carrier, great specific surface area, etc. in addition, the catalyst provides sufficient gas-liquid contact area, is favorable to mass transfer between gas phase and liquid phase, may be used in catalytic rectification and possesses both reaction and separation effects.

The invention discloses a synthesizing method of dielectric carbon material through hard moulding method, which is characterized by the following: sintering the composition of silica/molder or saccharose directly; removing silica to obtain dielectric carbon; shortening the synthesizing time with high sequence; fitting for manufacturing.

An electrode material of Fe¿CLi phosphate and its composite metal phosphate is electrode material of LiFePO4 and LiFePO4 / MxP in high density spherical shape with diameter of 2micro m. The electrode material of LiFePO4 and LiFePO4 / MxP can be prepared by low ¿C temperature controllable one ¿C stage atomizing process in short flow.

The invention discloses a method for separating enriched nickel and cobalt from a laterite nickel ore lixivium, which comprises the following steps: after solid and liquid separation between the laterite nickel ore lixivium and ore slag is implemented, a vulcanizing agent is added into the lixivium, the solid and the liquid are separated after reaction precipitation, and precipitated solid is washed by a new lixivium, thus obtaining sulfide precipitate; after the sulfide precipitate is pulpified, sulphuric acid and solution of nitric acid and mixed acid are added so as to implement oxidizing leaching; the goethite method is adopted for removing iron from a superior pickle liquor; a sodium thiosulfate solution is added so as to implement copper removing; a filtering liquor that is the enriched nickel and cobalt solution is obtained. Compared with the prior art, the method for separating enriched nickel and cobalt from the laterite nickel ore lixivium is implemented at normal temperature and normal pressure, does not need a high-pressure caldron, has less device investment, low running cost, simple technical path, short process and controllable production scale; the vulcanizing agent and acids that are used in the technique can be recycled to the utmost extent and do not have emissions and environment pollution; the extraction yield of nickel and cobalt can achieve over 95 percent, and the method for separating enriched nickel and cobalt from the laterite nickel ore lixivium has low production cost and easy industrialization.

An oxide sintered body including an indium element (In), a gallium element (Ga), a zinc element (Zn) and a tin element (Sn), and including a compound shown by Ga₂In₆Sn₂O₁₆ or (Ga,In)₂O₃.

The invention provides a self-cleaning super-hydrophilic thin film and a preparation method thereof. The preparation method comprises the steps of using tetra-n-butyl titanate as a precursor of TiO2, using anhydrous ethyl alcohol as solvent, adding glacial acetic acid, and magnetically agitating at room temperature to obtain solution A; synchronously, taking distilled water and anhydrous ethyl alcohol, adding doping salts, and magnetically agitating the mixture to obtain solution B; slowly adding the solution B to the solution A, adding hydrochloric acid to adjust pH value to 3-5, agitating to obtain TiO2 sol, and preparing a rare-earth-doped nanometer-sized TiO2 thin film by using a film drawing machine; immersing a substrate into the sol, drawing and plating a film after glass sheet and liquid surface are stable; drying after plating a layer of film and cooling at room temperature; repeating the steps to prepare the rare earth-doped nanometer-sized TiO2 thin film with different layers; thermally treating the base plated with the TiO2 thin film, and directly using the film-plated base. The thin film of the invention overcomes the weak points that nanometer-sized powder easily aggregates and is not easily recovered, the obtained crystal form is table, and the thin film has excellent self-cleaning and hydrophilic capacities.

The present invention is the lutein crystal preparing process from marigold flower. Lutein ester is first extracted from marigold flower with non-polar solvent under heating condition and then saponified with alkali solution in stirring and heating condition; and the saponified product is diluted with deionized water and separated, washed and vacuum dried. After that, the obtained lutein crystal is re-crystallized in three-component solvent of tetrahydrofuran, deionized water and normal hexane or petroleum ether; and the lutein crystal is suction filtered, washed and vacuum dried. The present invention has low-toxicity solvent in small amount used, simple technological process, high extraction, rate, and high product purity. The product of the present invention may be used widely as feed coloring additive and food coloring agent and in medicine and health care article.

A heat treatment technology for markedly raising comprehensive performance of aluminium alloy is accomplished by the adoption of the following scheme: carrying out a solid solution treatment on the aluminium alloy, taking the aluminium alloy out of a furnace and carrying out water quenching, and carrying out a pre-aging treatment, cold deformation and a secondary aging treatment. Nanometer-level aging precipitation strengthening phase is formed by the pre-aging treatment, and dislocation configuration generated from the subsequent cold deformation can be changed, so as to improve the strength, ductility and toughness of the alloy; during the cold deformation, nanometer-level atomic clusters will precipitate out from solute atoms precipitated during the pre-aging treatment, or ''pinning'' air mass is formed around the dislocation structure, thus further raising the strength of the alloy. The precipitated precipitation strengthening phase is nanometer level, thus raising the ductility and toughness of the alloy and markedly enhancing the strength of the alloy on the basis of guaranteeing good plasticity. The technological process provided by the invention is simple, is convenient to operate, can be adopted to markedly raise comprehensive performance such as the strength and plasticity of the aluminium alloy and improve the corrosion resistant performance and fatigue resistant performance of the aluminium alloy, and is suitable for industrial application.

The invention provides a preparation method and application of a supported metal oxide catalyst for removing ammonia nitrogen in water through catalytic ozonation. The preparation method comprises the steps of impregnating a catalyst carrier subjected to activating treatment in an impregnating solution formed through mixing any two metal salts of cobalt, manganese, cerium, iron, nickel, magnesium and copper for a certain time, then drying, and roasting to obtain the supported metal oxide catalyst. The preparation method is green and environmental-friendly, simple to operate, and easy for industrialization. By applying the supported metal oxide catalyst prepared by the invention, ammonia nitrogen can be converted into nitrogen at the normal temperature and the normal pressure so as to be effectively removed. Co3O4-Al2O3 is adopted as a catalyst for reacting for 6h, and the removal rate of the ammonia nitrogen of 200mg/L of ammonium chloride stimulated wastewater approximates to 100 percent, so that the supported metal oxide catalyst has a better effect on removing the ammonia nitrogen through catalytic ozonation.

A method for recovering noble metal from waste catalysts containing noble metal is carried out by pre-treating for waste catalysts containing noble metal, stage roasting, leaching noble metal into solution, purifying and recovering noble metal from solution. The immersion liquid adopts mixed solution with sodium hypochlorite, hydrion and chlorine ion. It's cheap, safe, clean and complete. It has less pollution and higher recovery rate.

A process for treating the used cathode carbon block of aluminium electrolyzer without environmental pollution includes such steps as calcining it in conjunction with the powdered coal ash rich in SiO2 and Al2O3, and ordinary-temp decomposing by sulfuric acid and lime to obtain AlF3, the material containing CaF2, SiO2 and Al2O3, and NaOH solution.

The invention discloses a method for preparing high-quality gasoline from cracking biological oil and relates to the technical field of hydrocarbon fuel preparation. According to the method, crude biological oil, lignocellulose, xylogen, phenolic monomer derived from the xylogen or/and lignin of the xylogen, cellulose, and a furan compound derived from the cellulose are used as raw materials. Under the catalytic action of Ni/HMFI catalyst, the hydrocarbon fuel is obtained through one-step hydrogenation deoxidizing conversion. Most of hydrocarbon products in obtained refined biological oil belong to the range of naphthenic hydrocarbon and aromatic hydrocarbon, does not contain sulphur and nitrogen, and belongs to high-octane high-quality clean gasoline fuel. The method has the advantage of being economical (source of the raw materials is wide and cost is low), simple in process, environment-friendly and easy to industrialize and the like. The catalyst is low in cost, efficient and easy in mass production, and products have significant application requirements. The method plays an important role in the field of replacement of fossil energy by biomass energy in the future, and is wide in application prospects.

The invention provides a compensation method and a compensation system for AMOLED pixel luminance. The compensation method comprises the following steps that 1) a pixel is closed, the light intensity of ambient light is detected, and the first light intensity value L1 is obtained; 2) a luminance signal of the pixel is set to be a reference signal Dref, the pixel emits light under the reference signal Dref, the second light intensity value L2 is detected and obtained, and the actual light intensity value L3 of the pixel satisfies the equation that L3=L2-L1; 3) the actual light intensity value L3 is compared with the reference signal Dref, a corresponding compensation signal Dcom is generated, and compensation is carried out on the luminance signal of the pixel. The compensation system comprises a detection module, a comparing module and a compensation module. According to the compensation method and the compensation system for the AMOLED pixel luminance, the method of optical feedback and signal compensation is adopted for improving uniformity of the AMOLED displaying luminance, and therefore quality of image display is improved. The compensation method and the compensation system for the AMOLED pixel luminance are simple, and industrialization is easily achieved.

The invention discloses a ceramic coating membrane and a preparation method thereof. The steps are as follows: the preparation of stem grafting ceramic powder, the preparation of functional power containing lithium-ion, the preparation of coating slurry and the preparation of ceramic coating membrane. The preparation method of ceramic coating membrane, provided by the invention is that: benzene sulfonate containing lithium is grafted on the surface of the ceramic powder, and then the ceramic powder grafted is coated on a polyolefin microporous membrane, thereby obtaining the ceramic coating membrane is obtained. The preparation method has the advantages of simple process, low requirements to equipment, easiness in condition control and low cost, and is suitable for industrial production. Due to the ion exchange capacity and hydrophily of the ceramic coating membrane prepared by the method, the ceramic coating membrane has a strong electrolyte infiltrating capability, is high in membrane breaking temperature, and has improved safety.

The invention relates to a method for recovering zirconia and yttria from the yttria-stabilized zirconia solid solution waste, which comprises the following steps: mixing the solid solution waste powder, sulfate and salt; acidizing and calcining at 200 to 320 DEG C; leaching the acidizing water and/or mother liquor under self-heating conditions; concentrating the leaching solution to leach zirconium sulfate; dissolving the zirconium sulfate in the water and purifying; neutralizing the zirconium hydroxide with alkali and precipitating; calcining the zirconium hydroxide to obtain zirconia; precipitating zirconium mother liquor to produce by-product of ammonium sulfate; neutralizing yttrium rich mother liquor and precipitating to obtain yttrium; dissolving yttrium rich residue with acid and purifying; precipitating oxalate to obtain yttrium oxalate; calcining to obtain the yttria. The method has the advantages of effectively separating the yttria from the zirconia in stable zirconia solid solution waste with optional yttrium ion under low temperature condition, changing the zirconia solid solution waste into valuables and utilizing the resources.

An extract of mulberry twigs is dislcosed, which can be used to prepare the food or the medicine to cure hyperuricemia and gout diseases. The said extract is prepared from mulberry twigs through extracting in solvent (aqueous solution of alcohol, chloroform, acetone, etc) at 10-100 deg.C more than one time, mergint the liquid extracts, recovering solvent, regulating pH value to 7.5-9.5, centrifugal separation to obtain supernatant, regulating pH value to 4-6, deposition, water washing wand drying. Several other approaches for purifying it are also disclosed.

Aiming at the condition that primary line current and voltage are not easily monitored by a sensor due to high voltage and large current when a high voltage circuit breaker works online, the invention provides an online monitoring method and an online monitoring device of a high voltage vacuum circuit breaker. The method comprises the steps of: using a displacement sensor directly connected with a moving contact of the high voltage circuit breaker to collect a stroke signal of the moving contact; calculating characteristic points on a stroke curve through a series of filtering and correction; and analyzing the characteristic points to calculate relevant parameters so as to judge the work condition of the circuit breaker online. The online monitoring method and device provided by the invention effectively monitor the high voltage circuit breaker online and can resist the monitoring environment of high voltage and large current. As the displacement sensor directly connected with the moving contact of the circuit breaker is just used as a unique signal collecting device in the invention, the problem of difficulty in implementation and high cost caused by the fact that high voltage resisting voltage or current sensors are needed to be used on a primary side line is solved.

The invention provides a method for comprehensively recovering tungsten and fluorine from minerals, namely a mixed acid of phosphoric acid and sulfuric acid is adopted for decomposing complex calcium-containing minerals containing fluorite, scheelite, apatite, and calcite, wherein the fluorite is decomposed to fluorine hydride or silicon tetrafluoride to escape, and absorption treatment is performed for preparing hydrofluoric acid or a fluoride salt; and the scheelite is transformed to phosphotungstic acid to enter into a solution, and filtrate after filtration is supplemented into the consumed sulfuric acid and the phosphoric acid after extraction of the tungsten and returned to the new-round mineral leaching. The method disclosed by the invention has the advantages of comprehensively recovering the fluorine and the tungsten from the minerals, reducing the requirements on the fluorite or the tungsten ore raw material, reducing the pressure on a mineral dressing link, improving the comprehensive recovery rate and simultaneously ensuring the decomposition rate of the fluorite and the scheelite, wherein the decomposition rate of the fluorite is above 98%, and WO3 contained in decomposition slag is reduced to below 0.5%; furthermore, a leaching agent can be recycled, so that leaching cost and wastewater emission are greatly reduced; and the method also has the advantages of simple leaching equipment, convenience in operation and easiness in realization of industrialization.