挖掘机工作性能是否良好，工作装置的合理性是一个重要标志。

The rationality of working equipment is an important sign of the Excavator's performance.

youdao

挖掘机工作性能是否良好，工作装置的合理性是一个重要标志。

The rationality of working equipment is an important sign of the Excavator's performance.

youdao