At that time,according to input-output relation of operational amplifier,a dry battery was used to produce a fixed voltage to simulate the input signal and then make the oil mist detector work normally.

Analysis was carried on the errors of dry battery voltage measured by using differnt models of voltmeter.

Making use of dry cell as the power snpply for the experiment of electrolytic water;

Enhancing whole nation's awareness of needs to protect environment and establishing an industry for treatment of spent dry cells;

This paper pointed out the error caused by the change of emf and internal resistance of dry cell, which exist in the experiment of the measurement of the emf and internal resistance of the dry cell with potentiometer.

The determination of zinc chloride and ammonium chloride in electrolyte of dry cells was stu died based on the principle of complexometric titration and acid alkali titration.

Recovery of zinc and manganese from waste dry batteries and electrodeposition with the recovered solution;

The article summarizes disposal technology of hydrargyrum,analyses disposal technics of hydrargyrum on recycling waste dry batteries, and puts forward a new technique for dissolving,vulcanizing and incinerating to dispose hydrargyrum of waste dry batteries.

The action of mercury in treating waste dry battery was investigated.

Contraposing to the disadvantages of several disposing processes of waste dry battery at home and abroad,this paper puts forword a new process to dispose of waste dry batteries with vacuum chloridizing roasting.