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 booster magneto, lifting magnets, mag, flywheel magneto, magneto electric, fly wheel magneto, bar magnet, artificial magnet, magnet