In this paper,the make of the setrock bullrod was crown life and footage cost with the reaovable boren were also discussed.
介绍了整体钎子的制作及其与活动钎子在凿岩效率、使用寿命和凿岩材料成本等方面的对比 ,得出的结果对类似工程有参考意
本网站所收集内容来自网友分享仅供参考,实际请以各学校实际公布信息为主!内容侵权及错误投诉:1553292129@qq.com
CopyRight © 2020-2024 优校网[www.youxiaow.com]版权所有 All Rights Reserved. ICP备案号:浙ICP备2024058711号