三: three刀: knife; sword单: singular number fate; destin ...投: throw; fling; hurl; cast开关: Q-switching单刀单投开关: single pole single throw switch; singlepolesinglethrowswitch双刀单投开关: double pole single-throw switch; doublepolesingle-throwswitch三刀单投: triple pole single throw; triple-pole single throw单投开关: single throw switch; single-throw switch三刀单掷开关: three-pole single-throw switch三刀双投开关: three pole double-throw switch; three-pole double-throw switch单极单投开关: single-pole single throw switch; single-pole single-throw switch双极单投开关: double-pole singlethrow switch三刀单掷: triple-pole single throw单刀单投: single-pole single throw单刀单投式: spst双刀单投: double pole single-throw; doublepole single-throw三投开关: three-throw switch双投开关: changeover switch; double throw switch; double-throw switch; doublethrowswitch四投开关: four position switch三刀开关: three pole switch; three-pole switch; triple pole switch三刀掷开关: three-pole double throw switch单刀单掷开关: monopole single throw switch; single pole single throw switch; single-ploe single-throw switch; single-pole single-throw双刀单掷开关: double pole single throw switch; double-pole single throw; doublepole single-throw; doublepole singlethrow switch单刀三投开关: single pole three throw switch
