• The excavation sequence is the key to the roadway stability in long-span full coal drift.

    跨度巷道开挖顺序关系巷道稳定性关键

    youdao

  • The excavation sequence is the key to the roadway stability in long-span full coal drift.

    跨度巷道开挖顺序关系巷道稳定性关键

    youdao

$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定