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.

youdao

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.

youdao