retaining rings

• 护环

retaining rings的用法和样例：

例句

1. This article has described expanding method for repairing the concave retaining ring caused by the hydraulic bulging.
   详细介绍了用扩冲法对液压胀形出现凹形的护环进行修复的方法。
2. The die and eqiupment of internal pressurized expanding retaining rings and double cone wedge-reaming die were also studied.
   对内增压扩胀护环的装置和双锥面楔块扩孔模具进行了研究。