grooved armature

例句：

1. 1. The engineer designed a groovedarmature to improve the machine'sefficiency.
   工程师设计了一个槽形结构来提高机器的效率。
2. 2. The grooved armatureis used in the manufacturing process to ensureprecision.
   槽形结构用于制造过程中以确保精度。
3. 3. The grooved armature has beenfound to be more durable than traditional ones.
   槽形结构比传统的更耐用。