Sealed batteries are not really sealed because all wet cell batteries have to be vented in order to discharge the build up of pressure during charging .
密封电池并不是真正密封，因为所有的湿电池都必须宣泄，以便履行积聚的压力在收费。
For example, it is common to still find UPS systems in electricity infrastructure using mature technologies such as Phase Control SCR and wet cell batteries.
例如，它是常见的仍发现在电力基础设施UPS系统使用诸如相位控制scr和湿电池的成熟技术。
Wet-cell batteries, which contain a liquid electrolyte, commonly power automobiles, boats, or motorcycles.
湿电池，其中含有的液体电解质，常用动力汽车，船，或摩托车。
Nearly 99 million wet-cell lead-acid car batteries are manufactured each year.
近99万湿细胞的铅酸汽车电池生产每年 。
Nearly 99 million wet-cell lead-acid car batteries are manufactured each year.
近99万湿细胞的铅酸汽车电池生产每年 。
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