had been ramping
Past perfect progressiveconjugation oframp.There are other translations for this conjugation.

ramp

The California-based company, led by billionaire Elon Musk, had been ramping up with frequent launches to make up for a backlog created by a launch accident in June 2015.
La compañía, con base en California y dirigida por el multimillonario Elon Musk, ha estado realizando múltiples viajes espaciales para tratar de compensar por los retrasos sufridos por un accidente en la base de lanzamiento en junio del 2015.
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