I don’t know if the students have broken the PCB board? It’s a fabricated board. It doesn’t work. I did. Twice in my memory. Why do the same mistakes happen so many times? Here are the details. The process of PCB board doing bad These two times are roughly like this, the production documents will…
According to Japanese media reports, a national medical institution in Osaka has successfully developed a small “artificial lung” (ECMO), which has played a crucial role in saving seriously ill COVID-19 patients during the current epidemic. Compared with the traditional ordinary ECMO, the small “artificial lung” is safer and simpler to operate, which can effectively reduce…
1, the rigidity of the grinding machine Because the cbn abrasive is relatively hard, the force on the grinding wheel shaft is much larger than that of the ordinary grinding wheel, so the grinding machine is required to have greater rigidity than the ordinary grinding wheel 2, the grinding machine should have a higher linear…
For graduates, if they want to graduate successfully, they must write a thesis, so the writing of the thesis is particularly important. A good thesis is mainly reflected in the thesis topic and research methods and results, a good thesis topic can provide great convenience for the later thesis writing, when choosing and writing the…