rigid magnet
... 硬磁性材料：hard magnetic material 硬磁铁：rigid magnet 硬磁的：magnetically hard ...
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硬磁铁氧体 [材] hard magnetic ferrite ; hard ferrite
沉淀硬化型磁铁 precipitation hardening type magnet
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矿石矿物主要有硬锰矿、软锰矿、褐锰矿、菱锰矿、钙菱锰矿等。脉石矿物主要有磁铁矿、针铁矿、黄铁矿等。
Ore minerals are composed of psilomelane, pyrolusite, braunite, rhodochrosite and manganocalcite and gangue minerals are composed of magnetite, goethite and pyrite and so on.
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