1. 底涂层：三、阳极电泳涂装(AED)和阴极电泳涂装(CED)的比较58二、车底涂层(undercoat)涂装工艺81四、汉高(Henkel)表面处理材料209

2. 涂底层;涂底漆：unauthorized person 未获授权的人 | undercoat 涂底层;涂底漆 | underground 地面之下

3. 底层：underbunching 群聚不足 | undercoat 底层 | undercooling 过冷

4. 底涂：undercoat 底漆;中间涂层;面漆下涂层 | undercoat 底涂 | undercooling 过冷

1. 底漆；内涂层
An undercoat is a covering of paint or varnish put onto a surface as a base for a final covering of paint or varnish.

noun

1. thick soft fur lying beneath the longer and coarser guard hair

Synonym: underfur

2. the first or preliminary coat of paint or size applied to a surface

Synonym: flat coatgroundprimerprimingprimer coatpriming coat

3. seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion

Synonym: underseal