protective coverings for electric cables generall电缆: power cable; wire外: outside; external side护: protect; guard; shield层: I storey; tier; stratum总则: general rules; general princ ...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:电缆外护层总则，即可在微信中查询翻译
