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.
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。
The flow of current population is rural to urban areas and small cities to secondary cities, secondary cities to the metropolis.
当前人口流动是农村向城市地区和小城市向二级城市，向二级城市的大都市。
As the main flow manner of formation water in deep reservoir, circulated convection current controlled authigenic mineral location and secondary pore distribution.
循环热对流是深部储层流体的主要流动方式，它控制着自生矿物在砂层中的析出位置和次生孔隙的分布特征。
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