All equipment using CAD, 3D simulation assembly, arrangementof equipment parts and accessories, pipe to more reasonable, compact structure and not crowded, operation, maintenance more hunman; According to different working condition of customized, non-standard machine ca...
we test whether, with the onset of the COVID-19 pandemic, the self-employed lost more hours than the employed and whether traditionally disadvantaged self-employed racial minorities faced harsher penalties in the form of reduced hours of work. Though spatially concentrated ethnic minority colocations...