变频电气传动variable: adj. 1.易变的,变化无常的,无定的 (opp. c ...frequency: n. 1.屡次,频仍,频繁。 2.(脉搏等的)次数,出现 ...electric: adj. 1.电的;带电的;起电的,导电的,发电的,电动 ...drive: vt. (drove , 〔古语〕 drave; dri ...variable frequency electric drive: 变频电力传动下载手机词典可随时随地查词查翻译