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Sure, that's exactly what it means. It is irrelevant to "spices, пряности" meaning.

"Заправка" as gas station and process of filling a vehicle (aircraft, etc.) is par for the course. Mostly used when referring to gas station.
But "заправка" for salad is rare. More often you will...

Специи - generic term for all 'spices'.
Пряность - все специи, которые имеют пряный (острый) вкус, запах.

фр. épices - специи - происхождение одно и то же, корень латинский, как и в англ. spices...