main frame

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English

Noun

main frame (plural main frames)

  1. Alternative form of mainframe
  2. the rigid frame upon which the moving parts of a machine are mounted; chassis
    • 1951 March, “British Railways Standard "Britannia" Class 4-6-2 Locomotives”, in Railway Magazine, page 186:
      The main frames are of 1¼-in. thick plates spaced 3 ft. 2½ in. apart, the centre lines coinciding with the centre of the axlebox guide faces.
  3. (shipbuilding) the widest structural frame located near the middle of a ship

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