“积垢”用英语怎么说？

我们用抹布擦去了它上面的积垢.We removed the accumulated filth of years from it with a cloth - brush.积垢年深月久.The grime is too ancient.鸡舍的清洁设备和运输工具通常都会有垫料和粪便的积垢.Poultry house cleaning equipment and vehicles usually have accumulations of ...