So this is the environment that this magnet in a ball can cover.

所以这个环境就是这个磁铁在球里所能覆盖的所有地方。

youdao

Magnetic-inductive linear position sensors with analog output provide a signal that is proportional to the position of the positioning magnet and cover measuring ranges of up to 200 mm.

磁感应与模拟输出线性位置传感器提供的信号，是成正比的定位磁铁的位置和覆盖测量范围可达200毫米。

youdao

The annular magnet is embedded into an inner cavity of the rubber ring, the plastic cover disk is covered at the back face of the rubber ring.

将环形磁铁嵌入橡胶圈的内腔中，再将塑料罩盘盖在橡胶圈的背面。

youdao

While the cover of the internal brains of the lock has been fixed so the Simplex cannot be opened with a magnet, we may not be quite done with this story.

FORBES: The Kaba Simplex lock is only for "access control": Is that what FDNY Engine Company 65 thought?