undercoat
名词 undercoat:
seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion
同义词:underseal
the first or preliminary coat of paint or size applied to a surface
同义词:flat coat, ground, primer, priming, primer coat, priming coat
thick soft fur lying beneath the longer and coarser guard hair
同义词:underfur
动词 undercoat:
cover with a primer; apply a primer to