在城市拆除爆破中，用小孔爆破法拆除重心很低、支承面大的浆砌片石构筑物难度很大。
It is difficult to demolish structure which has lower height of gravity center, larger supporting surface and mortar rubble with demolition blasting in city.
在城市拆除爆破中，用小孔爆破法拆除重心很低、支承面大的浆砌片石构筑物难度很大。
It is difficult to demolish structure which has lower height of gravity center, larger supporting surface and mortar rubble with demolition blasting in city.
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