The thermos, also called the thermos, was invented by the English scientist Dewar. In 1900, for the first time, he turned compressed hydrogen into a liquid, liquid hydrogen. This kind of thing has to be packed in bottles, but there is no such thermos at the time. He developed it himself. He uses a vacuum method to make a double-layered bottle, which removes the air in the compartment and cuts off the conduction. However, after this heat radiation will also affect the insulation, so Dewar applied a layer of silver or reflective paint in the vacuum compartment to block the heat radiation. Then use a stopper to block the bottle mouth. In this way, the three methods of heat conduction are cut off, and the bottle liner can maintain the temperature for a long time. He used this bottle to store liquid hydrogen. Later, it was widely used, and almost every one has a thermos bottle or a thermos. As shown in the figure, the circuit diagram of the Gongbao DFP-28AF DFP-36AF DFP-46AF electronic thermos.
Rental LED display screens
LED technology is the latest and the best in terms of the audio visual technologies out there and it is still evolving. There is a strong emphasis in making LED displays energy efficient, cost efficient and light weight apart from other quality requirements. Hence, LED cabinets are also now expected to be lighter in weight. This need has resulted into the gradual shift from the iron cabinet, aluminum cabinet, to the cast-aluminum and die cast aluminum as the weight of the cabinet is lighter. Cast aluminum and die cast-aluminum cabinets are the latest of the cabinets used for LED casing.
The cast aluminum and die cast-aluminum cabinets have high strength and high tenacity. They are highly efficient, provide excellent heat dissipation, energy conservation and environmental protection. Because of their outdoor usage, they can be made as a waterproof cabinet of leasing cast aluminum. They are lightweight and ultrathin. They are quite flexible for easy packaging and lifting. They have a high refresh rate, high grayscale and are widely applied to the stage renting. They are easy and simple to install and thus help you save on precious time and man power as one-person can easily do the insallation. Cabinet splicing and wiring connection is fast and reliable. Not only great in looks dept. it can be easily dismantled. Casting Aluminum and die Casting Aluminum Cabinet also have better deformation resistance property.
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