| 摘要 |
The crane consists of a pylon (21) with a jib foot (31) pivoted to its tip by one end (35) and having the jib (41) articulated to its other end (36). The jib has its tip (43) on one side of its pivot point (45) and a counter-jib (42) on the other, and the jib is retained by an assembly with one or more posts (16), a tie member (25) and at least one two-way power cylinder connecting the foot and jib. The foot and counterjib are designed to allow the jib tip to be aligned with the foot. |
