| 摘要 |
<p>A pantograph suction (110) arm is described, said arm comprising a first tube section (111) connected to a base (117), a second tube section (112) connected to a frame in the form of a hinged quadrilateral (118) on the base side, and a first elongated resilient balancing element (122) cooperating with said hinged quadrilateral frame (118) on the base side, one end (122a) of said elongated resilient balancing element (122) being pivotably mounted on said hinged parallelogram frame (118) on the base side, the other end (122b) of said resilient element (122) being pivotably mounted at a point (130) movable depending on the position of said hinged parallelogram (118).
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