短語詞組短語zero lift line 無升力線;零升力線zero grade line 施工基準(zhǔn)線;路基施工準(zhǔn)則線zero reactance line 零電抗線zero mean line 零均線zero stress line 零應(yīng)力線zero accumulative line 零點(diǎn)收斂指數(shù)zero base line 零基線zero layer line 零層線;中層線Zero wind line 零風(fēng)線 返回 zero line