The raiseboring is a new raising method deployed in China's mines in1980s.
天井钻进法是我国矿山于80年代推广应用的天井掘进新方法。
2
Since 1970s China has successively developed TYZ type and AT type raise borers and achieved remarkable results in raiseboring.
我国从七十年代以来,相继研制成功了TY Z型和AT型天井钻机,在天井钻进中取得了显著的效果。
3
The said incline raise borer, developed by Changsha Institute of Mining Re-search for incline raiseboring in dip onebody mining, is the first generation product in Chi-na.