起重机的大车轨道必须固定在行程梁上，小车轨道固定在主梁上。当起重机运行工作时，轨道不能有横向和纵向的移动，轨道还要便于调整。
论述了起重机轨道焊接的必要性，分析了其焊接性，拟定了焊接工艺并成功地焊接了产品。
The necessity for welding crane rails is analyzed; weldability discussed and welding procedure worked out. The product is successfully welded, too.
起重机现在正拼命将月亮拖离它的轨道。
轨道是起重机或小车平稳运行的基础，一般要求每年检查2 ~ 4次。
Track is the foundation of crane or car running smoothly, generally requires checking 2 ~ 4 times every year.
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