磁力探伤器用的退磁器 demagnetising equipment for magnetic crack detector
当你租或者买DVD光盘时，收银员会把它滑过一个垫子使其中的金属玻璃退磁，所以在你离开的时候不会引起警报。
When you rent or buy a DVD, the checkout clerk rubs it across a pad to demagnetize the metallic glass so it won't trigger an alarm when you leave.
可以拿一个没有受磁的铁环，将表在铁环中慢慢穿来穿去，这么重复几遍后，手表便会退磁复元。
Can not take a magnetic ring, the table in the hoop slowly to wear to wear, so repeated several times, the watch will Fuyuan demagnetization.
同时提供三个标准等级的磁性材料，满足具有高抗退磁磁场的广泛需求。
Three standard grades of magnetic materials are offered to fulfill a broad spectrum of magnetic field requirements along with a high resistance to demagnetization.
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