Little indium contained mercury free paper liner could be applied to the mercury free battery with natural MnO 2.
用铟量较少的无汞含铟浆层纸可用于含天然二氧化锰的无汞电池。
This paper precents the circuit and method of the replacement of zinc-mercury couple by LM399 in UT52 multilimit electric potential difference meter with better results.
本文介绍了在ＵＪ５２多量限电位差计中用ＬＭ３９９代替锌汞电池的电路和方法。