knothole mixer[机] 隔膜混合器
knothole floor环向楼板
Knothole Island诺索尔岛
knothole moulding machine木节孔整修机
Upshot-Knothole核试验
The calculator main knothole maintains计算机主板的维修
N（名词） a hole in a piece of wood where a knot has been (木头上的)节孔