Ring crane
A ring crane is a form of large construction crane with a luffing jib. It is distinguished by its slew pivot being in the form of a ring-shaped track, rather than a narrow central spindle.
A ring crane is a form of large construction crane with a luffing jib. It is distinguished by its slew pivot being in the form of a ring-shaped track, rather than a narrow central spindle.
A ring crane is a form of large construction crane with a luffing jib. It is distinguished by its slew pivot being in the form of a ring-shaped track, rather than a narrow central spindle.
Source: Wikipedia "Ring crane" · CC BY-SA 4.0
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