undercoating

(英:underseal)底部涂层

例句与用法：

An undercoat of paint or size applied to prepare a surface, as for painting.

底漆，涂底料油漆之前，涂在某一表面上作准备的底漆或涂料

I want all the existing paint stripped off and new undercoat and gloss applied. I want a thorough job, with no half measures.

我要把原有的油漆全部铲去，并要涂上新的内涂层和上光剂。我要彻底地干一下，决不马马虎虎。

词形变化：

动词过去式: undercoated | 动词过去分词: undercoated | 动词现在分词: undercoating | 动词第三人称单数: undercoats |

详细释义：

n.

(涂在汽车底部的)底部防锈层, 防锈底漆, 底漆