Among these three measures, notwithstanding the pressure regulation for the working face or the air chamber pressure regulation failed, the measure of filling the surface crannies will play a very important role.
Among these three measures, notwithstanding the pressure regulation for the working face or the air chamber pressure regulation failed, the measure of filling the surface crannies will play a very important role.
在这3项措施中，无论是工作面升压或气室调压失效，此时填堵裂隙工程则会发挥重要作用。