点火线圈初级绕组。电流通过线圈，产生一个电磁场，用来在次级线圈中产生高电压。
Ignition coil primary winding. Current flow through the coil produces an electromagnetic field, which is used to induce a high voltage in the secondary coil.
特别适合于高电压变压器绕组用内屏蔽导线。
The inner shield transposed conductor is especially suitable for an inner shield conductor of a high-voltage transformer winding.
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