Article InformationAuthor, 李洛
（八）放射源，是指除研究堆和动力堆核燃料循环范畴的材料以外，永久密封在容器中或者有严密包层的放射性材料。
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Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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除此之外，崔元俊甚至半开玩笑地说：「作为研发主管，最初这根本不是我想做的项目。」 对于未来，他直接交底：内部正在怀疑是否该开发下一代，目前还没有推出新款的决定。
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