The president of Brazil has been pursuing his big plans for the Amazon rainforest, even as parts of it burn in massive wildfires. He has been working to carve more mines and pave new roads. He has ...
Abstract: The rotor unbalance of the magnetic levitated turbomolecular pump (MLTMP) can lead to undesirable rotor synchronous vibration, and thus seriously affect the instrumentation precision in the ...
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