原创 关于开关(单刀、双刀/单掷、双掷)

SPST single-pole single-throw 单刀单掷(开关)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" />

SPDT Single-Pole Double-Throw 单刀双掷

DPST Double-Pole Single Throw双刀单掷(开关)

DPDT Double Pole Double Throw 双刀双掷(开关)