blast flame spraying

例句：

1. 1. The engineers were blast flame spraying the concrete for reinforcement.
   工程师们正在用爆破火焰喷射混凝土以增强其强度。
2. 2. The construction site was heavily blast flame spraying to clear the area.
   为了清理现场，施工现场正在进行大量的爆破火焰喷射。
3. 3. The firefighters were blast flame spraying to extinguish the blaze.
   消防员们正在用爆破火焰喷射来扑灭大火。