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what is the poor conductor of heat and electricity which is the poorest conductor of heat and electricity which metal is the poor conductor of heat and electricity which metal is the poorest conductor of heat and electricity what element is poor conductors of heat and electricity what are poor conductors of heat and electricity called what are usually poor conductors of heat and electricity what materials are poor conductors of heat and electricity which non metal is poor conductor of heat and electricity which compound is a poor conductor of heat and electricity
