Magnetite
แปลว่า(Concrete Engineering) An aggregate used in heavy weight concrete, consisting primarily of ferrous metaferrite (Fe304). A black magnetic iron ore with a specific gravity of approximately 5.2 and a Mohs hardness of about 6.
หรือคุณกำลังค้นหา magnetic chuck, non-magnetic, magnetic induction, magnetic fuel pump, rotary magnetism, electro-magnetism, residual magnetism, magnetic alloys