普雷里德萨克的通用印模冲压公司制造电池帽盖以及其他成形金属部件；
Universal Die & Stampings in Prairie du Sac, Wisconsin, makes battery caps and other shaped metal parts.
实验室的一个角落里放着一个高高的浮标，看上去就像一节巨大的铜帽电池。
In one corner is a tall buoy that resembles a huge copper-top battery.
作者对镀镍钢帽的物理性能进行了测试，并对镀镍钢帽电池和铜帽电池的电性能作了对比试验。
The properties of nickel plated steel cap were tested. And the electrical properties of nickel plated steel cap and copper cap for battery application were compared.
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