zero-difference detection零: zero zero sign; nought差: send on an errand; dispatch控: accuse; charge测: survey; fathom; measure光频外差控测: optical heterodyne detection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:零差控测，即可在微信中查询翻译
