single-Vee groove with root face

例句：

1. 1. The engineer designedthe machine to have a single V groovewith a root face for efficient cooling.
   工程师设计的机器具有单V型槽和带根面，以实现高效的冷却。
2. 2. Thenew model car has a unique single Vgroove with root face that enhances itshandling and performance.
   这款新型汽车拥有独特的单V型槽带根面，提升了其操控性和性能。
3. 3. The researcher found that the useof a single V groove withroot face in the design of thebridge significantly improved its durability and stability.
   研究人员发现，在桥梁设计中使用单V型槽带根面显著提高了其耐用性和稳定性。