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Titan crane

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Titan crane \Ti"tan crane\ (Mach.)
   A massive crane with an overhanging counterbalanced arm
   carrying a traveler and lifting crab, the whole supported by
   a carriage mounted on track rails. It is used esp. for
   setting heavy masonry blocks for piers, breakwaters, etc.
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