对微波频率下突出区煤的导电性质进行了探讨。
Study has been made on the effect of frequency on electric conductivity of coal in the outburst zone.
主要讨论了焦耳热效应和矿物质对煤导电性质的影响。
The effect of Joule heat and mineral matter on conductivity of coal has been studied.
根据导电性质的不同，碳纳米管可分为金属型和半导体型。
Based on different electronic properties, carbon nanotubes can be classified into metallic and semiconducting types.
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