в мастерской

in the workshop

→ в
phrase Rare #49,920
in the workshop Used for being inside or at a workshop, often a repair shop. The form мастерской is the prepositional case after в; compare в мастерскую, meaning “to the workshop.”
RU: Мой велосипед сейчас в мастерской.
EN: My bicycle is at the repair shop right now.

Работаешь в мастерской?

Do you work in the workshop?

— Пророк (2009)

Неприятности в мастерской?

Trouble in the workshop?

— Пророк (2009)

Его машина в мастерской.

His car is in the workshop.