短語(yǔ)詞組短語(yǔ)extension n line 分機(jī)線extension and line counter specification 擴(kuò)展和行計(jì)數(shù)說(shuō)明coefficient of extension line 展線系數(shù)extension line for dimension 尺寸標(biāo)注引出線extension line offset 尺寸界線偏移The West extension line 西延線restricted extension line 受限分機(jī)線pulse extension line 脈沖擴(kuò)充線 返回 extension line