结果表明，钢球开裂为淬火开裂，淬火温度过高是导致淬火钢球开裂的主要原因。

The main cause of the cracking is that the quenching temperature is too high.

youdao

结果表明，钢球开裂为淬火开裂，淬火温度过高是导致淬火钢球开裂的主要原因。

The main cause of the cracking is that the quenching temperature is too high.

youdao