drag chain

noun Shipbuilding.
one of a number of chains attached to a hull about to be launched in restricted waters in order to slow its motion by dragging along the bottom.

Origin:
1785–95

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The chopped hay is then moved by conveyor or drag chain to animal feed stations.
Fuel is fed to each boiler by a drag chain with adjustable feed, a rotary seal valve.
Grit is conveyed from the wet well to the pond utilizing a drag chain and auger.
Bottom ash was discharged from the grates to a wet quench tank and removed with a drag chain.
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