ferromagnetic materials的用法和样例：
例句
- The ordinary rectangular electro-magnetic chuck is used for holding common ferromagnetic materials for machining.
普通矩形电磁吸盘用于吸持一般铁磁性材料工件进行加工。 - It is the critical point of the phase transition of ferromagtic or ferrimagnetic materials into paramagnetic materials.
是指磁性材料中自发磁化强度降到零时的温度，是铁磁性或亚铁磁性物质转变成顺磁性物质的临界点。
