The function relations of the crater scaling-radius with projectile penetrating-depths and projectile charge parameters are established according to the similarity theory.

根据相似准则建立弹坑比例半径同弹体侵彻深度和弹体装药参数的函数关系。

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Volcanologists had known since June that a new eruption was possible, and people living within a six-kilometre (3.7-mile) radius of the crater were told to be ready to get out fast.

ECONOMIST: No disaster in the Philippines