Liu Yang, the first female astronaut in China, studied for a PhD at Tsinghua University during pregnancy and explained two things to her husband before flying
As the first female astronaut in China to go into space and successfully return to land, Liu Yang's abilities and excellence are evident to everyone.Liu Yang, born in Linzhou, Henan Province in 1978, was selected as the second batch of Chinese astronauts in May 2010...
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Finally, someone explained the building lightning protection Earthing system thoroughly and collected it for 10 times! Dry goods!
When it comes to building lightning protection Earthing system, most electrical designers must be very familiar with it. But for some beginners in electrical design who are just starting out, they may only know one thing and not know the other, and there are even some beginners in electrical design who do not know three things after asking...
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