火花塞必须在汽缸盖内形成良好密封以防止燃烧过程气体高压泄露，并且能够继续工作而且高压电路没有短路。
The spark plug must form a good seal inside the cylinder head to avoid leakage of without the high-tension current shorting-out.
介绍了密封铅酸蓄电池充电控制器UC3906的工作原理和应用电路。
The operation of integrated circuit UC3906 and its application in sealed lead acid battery charger are described.
同时给出了一种简单实用、工作稳定且性能可靠的12V密封铅酸电池双电平浮充充电器的实际应用电路。
At the same time, the application circuit of12V sealed lead-Acid battery dual-level float charger, which is simple, feasible and stable is produced.
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