The operation regulation mode of primary and secondary circuits in the course of heat-saving heating and warm-up heating is analyzed.
分析了一、二级管网在节热供热及升温供热过程中的运行调节方式。
The ignition system is divided into two circuits: the primary and the secondary.
点火系统分为两条回路：初级和次级。
The ignition system is divided into two circuits: the primary and the secondary.
点火系统分为两条回路：初级和次级。
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