Forced circulation solar hot water systems

What does such a system consist of? The basic system consists of solar panels, boiler, expansion tank, pump with control mechanism, mounting structure on the roof, and fasteners. Since the forced circulation system operates all year round, a glycol-based antifreeze solution is required in the solar panels. The entire system is essentially maintenance-free. It is […]

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Technology for All

I remember when my grandmother bought me my first watch. Of course, I wanted more toys. Because I was a kid for a really long time, and even in my twenties I still liked toys, and when I was fifteen my grandfather told me that a watch was important to any person, and that I […]

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Jan Deira Conservatory and High School

Education for those with special needs is not easy. Fortunately, we have a great tradition in this regard. For example, educating the blind is very difficult. Although integration is currently underway, it is true that certain special needs schools are irreplaceable.It is known that blind people often work in the field of music or massage. […]

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Nonsensical rumors about polystyrene are spreading through the Internet

Breathing masonry A very widespread myth about the impermeability of insulated masonry is spreading like an epidemic in society. However, it is necessary to be clear about the basic concepts of masonry: brick, block, and concrete. These alone, including lime plaster and plasterboard, allow only 5% of the air mass to pass through. Thus, in […]

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Drones delivering mail, robots in stores

Amazon drones – Amazon engineers have filed many exotic patents in recent years describing all manner of delivery drone operations. [At one time it was a giant blimp, at another it was a parachute parcel system. In early August of this year, the USPTO filed another patent application, expanding the patent registration to.– Freight trains […]

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How Toilets Evolved

Ever since people stopped living nomadic lives, they have been struggling with where to dispose of their excreta. It did not take long to discover that excrement not only smells bad, but also causes health problems. Therefore, it had to be disposed of in some way. So the first toilets were built.These were by no […]

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Cutting and planing wood

In sawmills where logs are processed, all wood must be sorted. This produces several sizes of lumber of varying quality. Lumber is sorted by size before drying and sorted by quality after drying. Lumber is graded by quality. Lumber is graded according to quality, that is, according to defects, shape stability, and required strength of […]

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