pole reversing key倒: reverse极: I the utmost point; extreme开关: Q-switching变极开关: polarization switch; pole changing switch单极开关: one-pole switch; single pole switch; single switch; single-pole knife switch; single-pole switch; singlepoleswitch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:倒极开关，即可在微信中查询翻译
