Black Iron Oxide (Magnetite) Black Iron Oxide is found useful, especially in semi-metallic formulas as an agent for elevating cold friction.
黑的铁氧化物(磁铁矿):黑的铁氧化物发现有用的,特别在半金属的配方作为提高冷的摩擦力。在半金属的配方的通用的成分。
Black Iron Oxide (Magnetite) Black Iron Oxide is found useful, especially in semi-metallic formulas as an agent for elevating cold friction.
黑的铁氧化物(磁铁矿):黑的铁氧化物发现有用的,特别在半金属的配方作为提高冷的摩擦力。在半金属的配方的通用的成分。
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