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| English | Russian |
| centre of gravity symbol | знак "центр тяжести" (Alexander Demidov) |
| copyright symbol | знак охраны авторского права (wikipedia.org Denis Lebedev) |
| radiation symbol | символ радиации (The international radiation symbol (also known as trefoil) first appeared in 1946, at the University of California, Berkeley Radiation Laboratory. wiki (Hazard symbol) Alexander Demidov) |