n.内层油漆；绒毛；底毛
An undercoat is applied to prepare a surface for painting. 底漆被涂在某一表面上为粉刷作准备。
I want all the existing paint stripped off and new undercoat and gloss applied. 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。
The quantity of undercoat is affected by climate and season. 底毛的数量受到季节和气候的影响。
He has a soft, dense undercoat with a profuse harsh-textured outer coat. 他拥有柔软、浓密的底毛和粗硬的披毛。
(英:underseal)底部涂层
