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[Subject: Mechanics]
- Aparello que muda a velocidade dunha máquina
Translated by: GIANNI GAVIOLI
Translated in 48 languages
[Subject: In Other Germanic Languages]
Translated by: ANTÓN MÉNDEZ GÁNDARA
Translated in 34 languages
[Subject: Chemistry]
- Substancia que aumenta a velocidade dunha reacción química.
Translated by: FELISA EXPÓSITO MARZABAL
Translated in 24 languages