Caisson (lock gate)

Ship caisson at Droogdok Jan Blanken at Hellevoetsluis

Graving docks at Birkenhead, closed by a variety of ship caissons and floating (sliding) caissons

The base of the caisson closing the graving dock where the SS Great Britain was constructed.

Manœuvres du bateau-porte de la forme de radoub Louis XV lors de la sortie de la frégate L'Hermione (1).JPG

A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock.

单词	Sliding caisson
释义	Sliding caisson 英语百科 Caisson (lock gate) A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock.
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Sliding caisson

Caisson (lock gate)