复数： undercoats

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。

Used as varnish , color paint and undercoat mixed with other component .

适用于配作各种清漆、色漆、底漆等。

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。

Siberians usually shed their undercoat once or twice a year .

他们的内毛一年之中脱落一次或者两次。

Phenomenon manifested in paint films by the wearing away of the finish to expose the substrate or undercoat .

漆膜由于面漆磨损而使基材或底漆暴露出来的现象。