double-pole double-throw双: two; twin; both; dual刀: knife; sword投: throw; fling; hurl; cast双刀双投开关: double-pole double-throw switch双刀双掷,双极双投: double-pole double-throw; dpdt下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:双刀双投,即可在微信中查询翻译