primer coat英 [ˈpraɪmə(r) kəʊt]美 [ˈpraɪmər koʊt]底(漆;镀涂)层;底覆盖结合层化学英英释义nounthe first or preliminary coat of paint or size applied to a surfaceSynonym:flat coatgroundprimerprimingpriming coatundercoat双语例句