has been quenching
-ha estado quitando
Present perfect progressivehe/sheconjugation ofquench.

quench

The planetary gear is not only cold extruded by pressing machine, but also it has been quenching heat treatment, so the quality is better.
El engranaje planetario no solo está extruido en frío al presionar la máquina, sino que también ha estado enfriando el tratamiento térmico, por lo que la calidad es mejor.
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