A permanent magnet is that a magnet that is permanent, in contrast to an electromagnet, which only behaves like a magnet when an electric current is flowing through it. Permanent magnets are made out of substances like magnetite (Fe3O4), the most magnetic naturally occurring mineral or neodymium, Samarium cobalt, a powerfully magnetic synthetic...

Precast concrete magnet shuttering magnets shutter magnets The precast concrete magnet is high-tech approach to fixed formwork casting beds. They are made of NdFeb magnets, which high attraction. The magnetic part of the shutter magnet is designed to be layered with steel flux to increase the contact area. The shell surrounded by iron or steel...

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