论文部分内容阅读
以前,我队在浅井施工中是用导火线点火放炮的。这样做非常危险,容易发生事故。经过山地工作人员讨论和研究后,提出了在地面点火放炮的方法:经过几
In the past, my team fired a pilot fuse in shallow wells. This is dangerous and prone to accidents. After discussion and research by mountain staff, put forward a method of blasting on the ground: after a few