Cardassian orbital drydocks were a type of drydock used by the Cardassian Union. During the Occupation of Bajor, several were located in orbit of the planet.
A month after Dukat became Prefect, the Bajoran Resistance destroyed an orbital drydock, killing over two hundred Cardassians.
Dukat told Benjamin Sisko about the destruction of the drydock when they were marooned together in 2374, following the destruction of the USS Honshu. (DS9: "Waltz")