Hazard symbol - Wikipedia
Hazard symbols are recognizable symbols designed to warn about hazardous or dangerous materials, locations, or objects, including electromagnetic fields, electric currents; harsh, toxic or unstable chemicals (acids, poisons, explosives); and radioactivity. The use of hazard symbols is often regulated by law and directed by standards organizations.
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History of the radiation warning symbol - Nuclear Hitchhiker
2017年4月25日 · The life of the radioactive ‘trefoil’ began in 1946 at the University of California, Berkeley. The symbol was first ‘doodled’ by members of a research group headed by Nels Garden, who wrote in a letter that the symbol “ would best symbolize the degree of hazard, type of activity, etc., but which was simple in design ”.
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Radiation Warning Symbol | NRC.gov
2021年3月9日 · Radiation warning symbol. An officially prescribed magenta or black trefoil on a yellow background, which must be displayed where certain quantities of radioactive materials are present or where certain doses of radiation could be received.
Who Made That Radiation Symbol? - The New York Times
2011年3月31日 · The symbol we commonly associate with radiation or radioactive materials was devised in late 1946 by an unspecified group of individuals working at the Radiation Laboratory of the University of...