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。
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。
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