The deep cycle life of battery made from Pb-Ca-Sn-Al alloy was increased and reached 435 cycles after improvement.
经过改进，提高了铅钙锡铝合金电池的深循环寿命，循环寿命达到了435次。
The deep cycle life of battery made from Pb-Ca-Sn-Al alloy was increased and reached 435 cycles after improvement.
经过改进，提高了铅钙锡铝合金电池的深循环寿命，循环寿命达到了435次。
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