uindexundercoating./uhn-der-koh-ting/US // ˈʌn dərˌkoʊ tɪŋ //底层涂料,底涂层,底漆,底涂Definitionsn.noun · 名词1.›a protective seal applied to the underside of an automobile to reduce corrosion and vibration.Level 4More words in u →