采用超大容量蓄电池组，能够有效的增加工作时间，延长使用寿命。
Using super capacity battery, can effectively increase working time, prolong service life.
独特的皮膜设计减少磨损，延长工作寿命。
Unique flat diaphragm design reduces wear and tear for long service life.
独特的皮膜设计减少磨损，延长工作寿命。
Unique flat diaphragm design reduces wear and tear for long service life.
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