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In the old days it was called a Caisson.
A caisson is a watertight container necessary for working on piers, for example. As the pier is constructed, water may be pumped out of the caisson keeping the designated work area relatively dry.
The disease was first named "cassion disease," by Dr. Andrew Smith, who was the on-site doctor while the Brooklyn Bridge was being built. He called it "cassion disease" because the workers developed it after working in the underwater cassions of the bridge.
An underwater bubble blower.
Decompression sickness (DCS) is the medical condition also called divers' disease, the bends, or caisson disease.
caisson foundationsare foundation systems created by drilling holes and filling them with concrete. A caisson pile is a cast-in-place pile that has a hollow tube driveninto the ground. The earth is excavated from the tube, and concrete is poured into the tube. Some caisson piles are flared out at the bottom to create a larger bearingsurface. These are sometimes called bell caissons.The purpose is to extend the foundation through soils that are not capable of load-bearing capacity.The caissons may be attached to grade beams and/or retaining walls or structural beams as intended and described by your engineer.
The Chinese bridge is called Kangshaun great bridge
It is properly called a gun carriage. You may see the term caisson or limber, but those do not support the gun- they were used to tow the gun carriage.
An underwater bomb is called a 'depth charge.
A turbidity current
Is it the Brooklyn Bridge
Torpedo...