The partially slewing crane is a kind of representative rotary railcrane, which is also the first developed type in our country.
门座起重机是我国研制最早、具有重要代表性的一种旋转式有轨起重机。
2
With the impact and vibration of the crane, it may cause the rail installation loose, the connector fall off, deformation, crack, precision index super difference.
随着起重机运行时产生的冲击和振动，可能引起轨道安装的松动、连接件脱落、变形、裂纹、精度指标超差。
3
Material for rail of crane is of strong strength because of high carbon content, but of poor weldability, which makes more cracks. Strict technique is required in such welding.