可以高效地生产带有固体外壳的泡沫型芯材料。
Foam core materials with solid skins are efficiently produced.
在干电池中用膨胀石墨代替乙炔黑作为电芯材料。
The expansion graphite replaced acetylene black as electrical core material in dry battery.
磁头磁阻的计算中，分别就磁芯材料的磁导率为实数和虚数的情况进行了讨论。
The calculation of head reluctance deals with two conditions in which the core material permeability is real or complex.
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