Accumulators ; tests ; sealed lead storage batteries with grid type plates and immobilized electrolyte , maintenance free ; test methods 蓄电池.试验.采用栅极板和不流动电解液的免维护密封
Nickel - cadmium - accumulators ; cells with pocket - type plates , cells in steel and plastic containers ; electrical characteristics ; discharge duration 镍镉蓄电池.袖珍型板电池钢与塑料容器电池.电气特