(英:underseal)底部涂层
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
A thick undercoat is common to all. 浓密的底毛是身体各部位都有的。
The undercoat is soft and dense. 底层被毛柔软浓密。
The Springer has an outer coat and an undercoat. 英国激飞猎犬拥有外层披毛和底毛。
The undercoat, however, may be slightly lighter. 底毛，颜色可能略浅一些。
A profuse frill on chest.There is no undercoat. 背上和身体两侧的毛发笔直。
