grooved surface 表面有沟槽的
grooved pattern 沟纹图案
grooved board 开槽板
A: Why is the surface of this part so grooved?
A：为什么这个零件的表面有这么多沟槽？
B: It is designed that way to allow oil to flow smoothly.
B：这样设计是为了让油能顺畅流动。
1) 带有沟槽的
2) 有纹路的
3) 开槽的
1. 带有沟槽的
adjective
1. having long, narrow cuts or depressions on the surface
Synonym: furrowed, channeled, notched