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  1. A cylinder containing water or oil under pressure of a weighted piston for hydraulic presses, hoists, winches, etc. It is between the pumps and the presses, keeps a constant pressure on the system, and absorbs shocks.
  2. A storage battery.
  3. In oceanography, a spring of rubber or steel attached to a trawling warp, to lessen any sudden strain due to the trawl catching. CTD
    Source: Dictionary of Mining, Mineral, and Related Terms

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