腿现象 meaning in Chinese

leg phenomenon

The main shuchural features of the new electric single - girder overhead travelling crane presented in this paper is as follows : using a special gisder section to provide simple production technology and light weight ; dopting hinged connection at one end between main glrders and end carrages instead of the rigid connection at both ends , eliminating the three - point supporting problem with the crane and thus improving the travelling perfomance ; extending crane wheels life contributed to the combination of no - flange crane wheels and horizontal rollers
提供种生产工艺简单、自重轻的主梁截面，并将单梁起重机主、端梁的刚性连接改为端用铰接连接，解决了在制造和轨道安装时因误差而造成的大车运行三条腿现象，提高了运行性能；用可调大车运行水平轮中心距的设计，代替带轮缘的大车轮，提高大车轮的使用寿命。