These activities started long before the advent of personal computers, when there were no cell phones or even blogs. If you have any questions or inquiries about this article, please send me the following email. I may make typos or omissions, or add or supplement later. Please forgive me if it is difficult to read. I'm also doing research on piezoelectricity natural stone based on crystal , free energy, bio-energy, earthquakes, and various other topics. This blog is biased in its subject matter, but I will continue to write in the hope that we can reduce the number of problems that tend to be covered by society and that people can live their lives with peace of mind.。
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