另一方面，在商业上可购到现成的负极板膨胀剂。
On the other hand, prepared negative plate expander is commercially available.
金属极板还被深度刻蚀，从而极大地扩展了其表面的面积。
The metal plate is also deeply etched so as greatly to increase its surface area.
德国阳光蓄电池极板选用无锑合金，德国阳光蓄电池自放电极低；
Germany sun battery plate with no antimony alloy, Germany sun battery self-discharge is extremely low;
德国阳光蓄电池极板选用无锑合金，德国阳光蓄电池自放电极低；
Germany sun battery plate with no antimony alloy, Germany sun battery self-discharge is extremely low;
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