May provide other drilling services, such as repair or dismantling of existing water well structure, elevator shaftdrilling and hydro pole drilling.
可能会提供其他的钻井服务，如维修或拆除现有水井结构，电梯井钻井和水力极钻井。
2
To make their design rational, a knowledge based shaftdrilling and blasting design expert system (SDBES) was developed using OEC, a tool for expert system.
为使其设计合理，利用专家系统工具o EC开发了立井钻眼爆破设计专家系统(S DBES)。
3
Theoretical analysis is used to analyze shaftdrilling lining's vertical stability problem in floating and dropping phases, its stable equilibrium is proved.