I spent quite a bit of time going over the entire surface of the quartz sheet with the 20x objective looking for any sign of fractures, chips, or damage, as well as inspecting both of the electrical connections from the crystal to the package for cracks or any sign of electrical defects. And I found nothing. This quite surprised me, because I expected the failure mode of a sonicated quartz oscillator to be “shake the resonator to pieces or rip it off the mount” and I was seeing nothing of the sort.
Иран выпустил ракеты и беспилотники по соседям после обещания не атаковать их19:36
。新收录的资料是该领域的重要参考
В Финляндии предупредили об опасном шаге ЕС против России09:28
有人会问：在太空进行3D打印究竟有何意义？
以法固本，打牢推进中华民族共同体建设的法治根基。党的十八大以来，以习近平同志为核心的党中央把铸牢中华民族共同体意识作为新时代党的民族工作和民族地区各项工作的主线，推动民族团结进步事业取得历史性成就。制定这部法律，目的是“通过国家立法的方式把党在民族工作中取得的重大理论和实践成果转化为国家意志，健全铸牢中华民族共同体意识制度机制，进一步增强中华民族凝聚力向心力”。这一定位，深刻揭示了立法的时代意义。