资料来源 : pyDict

螺旋起重机

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Jackscrew \Jack"screw`\, n.
   A jack in which a screw is used for lifting, or exerting
   pressure. See Illust. of 2d {Jack}, n., 5.

资料来源 : WordNet®

jackscrew
     n : screw-operated jack [syn: {screw jack}]