The ionizing radiation symbol, featuring three curved blades emanating from a central point , has been used since 1946 to warn workers, scientists and the public of the presence of radioactive material. Since then, the distinctive trefoil has become an internationally recognized symbol.
20 июн. 2024 г.
An officially prescribed magenta or black trefoil on a yellow background, which must be displayed where certain quantities of radioactive materials are present. |
The black-and-yellow trefoil symbol—long the accepted label for denoting radioactive material—is getting a com- panion. And it's hoped that the new symbol will ... |
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