secondary blasting

例句：

1. 1. Theconstruction crew used secondary blasting to removethe old concrete foundation.
   施工队使用二次爆破来移除旧的混凝土地基。
2. 2. Duringthe construction of the new bridge, secondaryblasting was used to create a smoothsurface.
   在建造新桥的过程中，使用了二次爆破来创造一个平滑的表面。
3. 3. Thesafety regulations require that secondary blasting beconducted in accordance with strict guidelines.
   安全规定要求按照严格的指南进行二次爆破。