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double block

noun Machinery.
  1. a block having two sheaves or pulleys.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for double block

Historical Examples

  • An iron thimble, large enough to hook the double-block of a side or train tackle, is spliced into the end of each purchase-fall.

    Ordnance Instructions for the United States Navy.

    Bureau of Ordnance, USN