Subjects: *GREEN fuels; *COVID-19 pandemic; *VOCATIONAL guidance
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Subjects: *FIRE prevention; *FIRE protection engineering; *SAFETY standards
Subjects: *CONSUMPTION (Economics); *COVID-19 pandemic
Subjects: *COVID-19 pandemic
Subjects: *BUS transportation; *ELECTRIC motor buses; *COVID-19 pandemic
Subjects: *CLEANING; *COVID-19 pandemic; *COVID-19
Subjects: *TRACKING radar; *PHASED array radar; *MILITARY electronics
Subjects: *MUSCULOSKELETAL system diseases; *POST-acute COVID-19 syndrome; *CARDIOVASCULAR diseasesUNITED States
Subjects: *COVID-19; *GENETIC mutation; *MACHINE learning
Subjects: *HEALTH care industry; *COVID-19; CRITICAL care medicine