The limits are valid for bearings before mounting under zero measuring load, and with no axial displacement of one ring relative to the other.

在测量负荷为零、而且一个套圈相对于另一套圈无轴向位移的情况下，这些限值对安装前的轴承有效。

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Having now understood the house's behavior under stress, Kopp and his team will now set about recreate the experiment but this time measuring the load on the nails which lifted.

CNN: Engineering a hurricane-proof roof