钻井工人和爆破手经常进行钻探及爆破活动。
Drillers and blasters often perform both drilling and blasting activities.
本单元组包括拥有和经营自己生意的挖掘，分级，铺路，钻井和爆破承建商。
This unit group includes excavating, grading, paving, drilling and blasting contractors who own and operate their own business.
本单元组包括拥有和经营自己生意的挖掘，分级，铺路，钻井和爆破承建商。
This unit group includes excavating, grading, paving, drilling and blasting contractors who own and operate their own business.
应用推荐