projecting groove

• 凸出沟槽

projecting groove的用法和样例：

例句

1. He took his pocketknife and in the big oak made a groove.
   他拿出他的随身小折刀，在大橡树上划了一道沟槽。
2. Slide one half of the splash guard into the groove on the relief valve body.
   将防溅保护的一半滑动到安全阀阀体的沟槽上。