底涂层

1.groundglaze  2.basecoat  3.undercoat  

底的英语翻译：

a copy kept as a record; base; bottom; end; fundus; the truth of a matter
【医】 base; basement; bases; basi-; basio-; basis; batho-; bathy-; fimdi
floor; fundus; pavimentum; solum

涂层的英语翻译：

coating
【计】 coating
【化】 coating