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开放式蓄电池相对便宜，但维护工作量较大。
Vented batteries are less expensive, but require more maintenance.
youdao
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阀控式铅蓄电池仍是电动自行车的主要电源。
The VRLA battery was the basic power source for electric bicycle applications.
youdao
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阀控式铅蓄电池仍是电动自行车的主要电源。
The VRLA battery was the basic power source for electric bicycle applications.
youdao