Terms containing double-pole single- throw

Subject	English	French
earth.sc., el.	double-pole single-throw	bipolaire à une direction
earth.sc., el.	double-pole single-throw	bipolaire à 1 direction
earth.sc., el.	single-pole double-throw	unipolaire à deux directions
earth.sc., el.	single-pole double-throw	unipolaire à 2 positions