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摘要

The invention relates to a method for fire-fighting, and to a rescue boom and a nozzle of a piercing tool. A rescue boom (3) is provided with an elongated piercing tool (7) that can be pushed through a shell (8) of a burning object. A fire extinguishing medium can be conveyed through the piercing tool to a nozzle (12) provided in the piercing tool. The nozzle is provided with orifices (17) arranged such that single jets (20) form a single uniform jet (13) having a flat curtain-like shape.