The dielectric coefficients of hematite ores measured in audio frequency range are always large in value, and show that hematite is a special dielectric.
在声频范围内测得赤铁矿介电系数值较大，说明它是一种特殊的电介质。
The dielectric coefficients of hematite ores measured in audio frequency range are always large in value, and show that hematite is a special dielectric.
在声频范围内测得赤铁矿介电系数值较大，说明它是一种特殊的电介质。
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