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As a key driver of the night economy, the demand for urban night scene lighting projects is becoming more and more obvious.  commercial lighting solutions   , What kind of lighting engineering company can guarantee disruptive innovation for the socio-economic development of big cities?  1. Look at the service, whether it can clearly propose a purposeful solution according to user needs. Whether the customer service responds in a timely manner, whether the response is technical, and whether the customer's problem can be handled well.  2. Look at the design team, whether the lighting engineering company has its own high-quality lighting design team, and whether the designed works are in line with reality, ensuring aesthetics, economic development, and execution. 3. Looking at the construction quality, whether Lianghua Engineering Company has a technical professional construction team, a good construction team, not only takes the initiative to fully consider doing the ...

In general, for low-risk activities, such as walking or participating in uncrowded outdoor activities, wearing a two- or multi-layer cloth mask made of cotton or similar materials is fine. But for more protection, surgical masks, also known as medical masks, are a better choice, as long as they fit the face. wholesale kn95 face mask ，  Both types provide a physical barrier that helps reduce the spread of the virus through mouth-nose droplets, but allows breathing through the cloth. You can increase the effectiveness of the mask and improve its fit by wearing a two-layer mask (a cloth mask over a surgical mask). For optimal protection, high-filtration respirators like the KN95, N95, and KF94 are the most protective, even preventing the inhalation of tiny particles in the air. However, in the early days of the epidemic, masks were in short supply and needed to be reserved for medical staff. Fortunately, there is now a sufficient supply of high-filtration masks. High-filtering respira...

1. Small size, light weight, saving manufacturing materials, easy to carry and move. Since the inverter frequency in the equipment is much higher than the power frequency, the volume and weight of the transformer will be greatly reduced. ​inverter welding machine    Similarly, if the operating frequency is greatly increased, the volume and weight of the reactor will be greatly reduced. 2. Energy saving and high efficiency The volume and weight of the transformer and the reactor are greatly reduced, and the corresponding power loss is also greatly reduced, and the effective power output can reach 82% to 93%. The effective power output of traditional welding machines is only 40% to 60%, which is a serious waste of power resources. 3. Good dynamic characteristics and flexible control The inverter welding machine adopts electronically driven semiconductor power devices, which can precisely control the current size in the microsecond time range. The improvement of control accuracy ...

Inverter DC manual arc welding machine and inverter semi-automatic gas shielded welding machine are mainly used for welding various metals such as low carbon steel, medium carbon steel and alloy steel. Inverter argon arc welding machine is mainly used for welding stainless steel, aluminum, titanium, zirconium, etc. ​igbt inverter welder , especially stainless steel sheet welding. Troubleshooting: Boot Protection The reasons for the failure are as follows: 1. The field tube is damaged, it is overcurrent protection. 2. The secondary rectifier tube is damaged, which is overcurrent protection. 3. If the intermediate frequency transformer is damaged, it is overcurrent protection. 4. The temperature control switch is damaged, which is error protection. 5. The protection circuit of the control board is damaged, which is an error protection. When the protection circuit of the welding machine does not work, the overcurrent of the welding machine will cause the machine to explode. During mainten...

1. The welding machines mainly used by industrial and mining enterprises are: AC arc welding machine, DC electric welding machine, argon arc welding machine, carbon dioxide protection welding machine, butt welding machine, spot welding machine, submerged arc welding machine, high frequency welding machine, flash pair welding machine Welding machine, pressure welding machine, butt welding machine, laser welding machine. welding machine manufacturer (1) The difference between the application fields of AC welding machines and DC welding machines is that AC welding machines are generally used in steel structure manufacturing units or general general machinery or agricultural machinery manufacturing units. Direct current is mainly used for welding machines in the manufacture of pressure vessel boilers, pipes or important structural manufacturing units. (2) The main application fields of the inverter welding machine are the same, but the welding machine is more energy-saving and lighter. (3)...

Now the types and quality of  portable blood pressure monitor  on the market vary greatly, so the correct choice is very important. At present, there are three types of electronic sphygmomanometers on the market: arm type, wrist type, and finger type. All three are suitable for home blood pressure monitoring of healthy people. But the wrist and finger are not suitable for patients with hypertension, diabetes, hyperlipidemia, atherosclerosis and peripheral circulatory disorders. Because of the difference in arterial pulsation and elasticity, the blood pressure measurements of the wrist, finger and upper arm are quite different. The elderly and the above-mentioned patients should choose an arm-type electronic sphygmomanometer. Before purchasing an electronic sphygmomanometer, we need to check the relevant qualifications of the purchased electronic sphygmomanometer to exclude irregular and shoddy electronic sphygmomanometers, which is the basis for ensuring the quality of electro...

Abstract stainless steel sculpture is a relatively common type of sculpture now. Abstract  stainless steel sculpture  does not have strict requirements for specific shapes, and does not require the shape of the sculpture to be similar to any actual thing, but it also has certain requirements and needs to have a certain state. Some abstract stainless steel sculptures are completely abstract, which requires the sculpture not only to have beautiful features, but also to have a certain inner meaning, but also to show exaggerated beauty and inner meaning, such as abstract human sculpture. Abstract stainless steel sculpture expresses a realm beyond reality, which is a realm that realistic stainless steel sculpture cannot express. Some people think that abstract stainless steel sculpture is deformed stainless steel sculpture. Such understanding is relatively one-sided, abstract stainless steel sculpture It changes from a figurative form to an abstract form. Abstract stainless steel s...

Enterprises will use some of their own mascots as gifts in some business activities to achieve the effect of publicity. Plush toys are one of the products that are suitable for gifts. When designing corporate mascot dolls, generally are integrated into the corporate culture. It can well promote the culture of the  toy supplier   . Most companies will choose to use the cartoon image of animals as the general direction of design, mainly because the animal image has many features that can be exaggerated and used in expression and body structure, making the designed image more eye-catching and prominent as the endorsement of the corporate brand. There are also some companies that use anthropomorphic images to design without using any specific things as prototypes. The feature design can be more bold and free than animal images, and some human features such as hands, feet, and eyes can be customized according to the corporate culture. Exaggeration, so that the product has its own c...

It is said that stone paper is environmentally friendly paper, so do you know the environmental protection significance of stone paper  stone paper recycling ? 1. Environmental protection materials, energy-saving technology, no pollution (no strong acid, no strong alkali, no bleach, no fluorescent agent, no water, no tree cutting). 2. Good physical strength (tear resistance, folding resistance, freezing resistance). The price is relatively cheap, the recycling process is easy, and no waste water and waste gas are generated.   4. It can be naturally decomposed and returned to the land after being exposed to sunlight for about six months for a long time. There are many exquisite printing and packaging products of environmentally friendly stone paper. The stone paper is suitable for most printing methods. like： How to view the long-term development of stone paper  The concept of environmentally friendly stone paper  What are the excellent properties of stone paper

With the development of automation, automation equipment manufacturers are all over the place, but the quality is uneven. How to choose the right  soldering machine   manufacturer? Nowadays, the development of automatic soldering machines is relatively mature, and professional automatic soldering machines can be found for specific products, such as USB soldering machines, wire soldering machines, PCB soldering machines, soft board soldering machines and so on. There are many products of spot welding, so there are many manufacturers of automatic spot welding machines, in addition to automatic pressure welding, pulse welding, drag welding, wave welding, etc. When evaluating automatic soldering machine manufacturers, there are several main points: 1. Whether they have R&D and after-sales service capabilities 2. Factory size 3. Price and accessories brand and quality assessment. like： How to choose a good soldering machine manufacturer  How to choose a good automatic...

In addition to household paper manufacturers, there are also manufacturers and manufacturers of packaging paper and even various high-standard specialty papers. What specific aspects are the advantages of these  recyclable paper  manufacturers mainly reflected in? 1. Possess professional production equipment The obvious advantages of excellent paper manufacturers are concentrated in the high-tech modern machinery and equipment running at high speed in the workshop. There is a very direct relationship between the effect of paper manufacturers and the standardized use of these specialized modern production equipment. The use of these professional equipment can ensure the quality of paper to a greater extent and enrich the variety of paper produced. 2. Have an excellent management system It can be said that a key indicator for evaluating the status of a manufacturer in the industry is the level of management of the manufacturer. It is an important advantage that paper manufacture...

There are many micro laser engraving machines on the market, so there is no need to worry about where to buy them. But do you know which brand of micro laser engraving machine is good?  Micro laser engraving machine  How to buy it? First, the difference in engraving materials is the basis for choosing a small laser engraving machine. The engraving machine is divided into fiber laser engraving machine and diode laser engraving machine. The former is mainly for metals, and the latter is mainly for non-metals. Second, how to deal with the material, the general small laser engraving machine has three functions, engraving, cutting and marking, of course, according to the wattage of the small laser engraving machine. Third, the area size of the engraving material is required, and the laser engraving machine should be purchased according to the size to be engraved. It is appropriate to choose a large-area laser engraving machine. The engraving speed is relatively slow. Fourth, engrav...

laser hair growth helmets   are suitable for sparse groups, not limited to men and women. In fact, some data in the past show that the effect of long-term use of laser hair growth helmets is more obvious for sparse women, mainly because women are generally diffuse and sparse, and there are few obvious baldness and other conditions, so the effect is more obvious. The advantages of laser hair growth helmets compared with other laser hair growth products are mainly reflected in the convenience of use, not affected by the external environment, can be used anytime and anywhere, the appearance is not exaggerated and will not attract too much attention, and the use time is short and easy to adhere to. down. Summary of experience: Laser hair growth helmets can be used, but you need to stick to them to achieve the effect! like: ​Are laser hair growth helmets useful? ​The role of laser hair growth helmet   ​Are there any side effects of laser hair growth helmets?

1. Types of  ​high speed elevator  . Choose according to the purpose of the building, the working requirements of the building for the elevator, the use environment of the elevator, etc., such as choosing passenger elevators, freight elevators, escalators or moving walks; choosing the drive mode, control mode, machine room or no elevator engine room, etc. 2. The function of high-speed elevator. In addition to some basic functions, the elevator also has some optional functions to meet the special conveying requirements of buildings. 3. The quality and technical level of high-speed elevators. Elevator quality includes equipment quality, installation and commissioning quality and maintenance service quality, which directly affects the life of the elevator. 4. The elevator is energy-saving, environmentally friendly and low-noise. Frequency conversion control, gearless drive can save energy and reduce noise. In addition, attention should be paid to electromagnetic pollution, hydrau...