ct as anchorages or supports for the great sus-pension cables which are strung from mast to mast.Upon these cables in turn travel the carriages whichconvey the material to any point between the masts.It will thus be seen that by utilizing the athwartshipmotion of the cars on the masts and the… … System of Masts, Yards, and Cable Lines as Used for Handling: Material in Building- theTwo Great Steamships at New London. the work may require may be suspended from mast tomast. For instance, as at present operated this systemhas four traveling trolleys, each having transverse andlongitudinal…
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