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in collective life prisons, how to ensure that "residents" do not break out of infectious diseases is also a headache. after all, there are so many p...
guangdong hechuang electronic technology co., ltd. won the bid for this procurement project with good product quality and excellent service quality. b...
microseismic life detector is a detection equipment mainly used in prisons, detention centers, customs, border defense and other places. its purpose i...
there are 197 countries in the world. large countries span thousands of miles and small countries take hundreds of steps. some of these countries face...
customs is the gateway of a country. in the era of economic globalization, the status of customs is more important, especially in china, which has a h...
the development of the times has brought about a surge in population, a peaceful social environment and developed medical conditions, which have exten...