challenges – phrases

English	Chinese
blast design challenge	爆破设计难题
drilling challenges	钻孔难点
One of the greatest challenges, which a blaster faces in mining and contruction blasting, is to accurately determine the bounds of the blast safety area	爆破人员在采矿及建筑拆除爆破过程中所面临的一个最大难题、是准确算岀爆破安全区的范围
Since the factor having the greatest influence over blasting is geology, complex geologic structures can make small fragmentation a true blast design challenge	由于对爆破影响最大的因素是地质、所以复杂的地质结构会使小规模的岩石爆破成为真正的爆破设计难题