An inorganic heat-resistant insulating film (32) is formed on at least a part of a surface of the dust core (31) which faces a winding wire (12).

在压粉磁心(31)中的与线圈(12)对向的面的至少一部分上，形成有无机类的耐热绝缘被膜(32)。

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Structure: High Temperature High Pressure Hose for the winding wire matrix, skin coated nano-refractory coating layer, stainless steel wire woven layer and layer fire-retardant composition.

结构：以耐高温高压钢丝缠绕胶管为基体，外皮包覆纳米耐火涂料层、不锈钢丝编织层和阻燃层构成。

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Sensitivity was increased using a 6-layer pure aluminum wire winding voice coil, larger cone area and larger magnet.

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