资料来源 : pyDict

由悬挂处取下,取去吊索,自吊索上放下

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

Unsling \Un*sling"\, v. t. [1st pref. un- + sling.] (Naut.)
   To take off the slings of, as a yard, a cask, or the like; to
   release from the slings. --Totten.