We adopt the method of the relative composite standard uncertainty for estimating the uncertainty of copper alloy electric-conductivity measured by Kelvin method.
采用相对合成标准不确定度的评估方法，对用开尔文法测量铜合金导电率结果的不确定度进行了评估。
The results showed that the soluble salt in S. salsa planted soil decreased by 41 % (method of weight) and 37% ( method of electric conductivity) compared with that of control respectively.
结果表明，种植区碱蓬根系土壤的可溶性盐分与对照土壤相比下降了41％（重量法）和37％（电导法）；
In this paper the polyaniline free standing film with better electric conductivity and mechanical properties was prepared by electrochemical method and doping with perchloric acid.
采用电化学方法，以高氯酸为掺杂剂，合成了具有较好导电性能和机械性能的聚苯胺自支撑膜。
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