setback ball

• 惯性钢珠

setback ball的用法和样例：

例句

1. Mechanical Power vises are designed with an unique Ball design structure to furnish superior holding strength with powerful clamping forces to maximize processing accuracy.
   采用特殊钢珠设计结构，提供强有力的夹持力，进而提高精度。

词汇搭配

• set back 推迟