The physical core is crystallized in magnetic iron-nickel alloy-composite. The core is not hollow.
物质核心是磁性铁镍合金复合材料的结晶，其核心不是中空的。
The magnetic nano-composite particle has a typical core-shell structure.
磁性纳米复合粒子具有典型的核壳结构。
The magnetic nano-composite particle has a typical core-shell structure.
磁性纳米复合粒子具有典型的核壳结构。
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