| http://www.w3.org/ns/prov#value | - Thus, in lighting a re, if it is necessary to get at concealed fires within walls or ceilings, the tip of the fire hose nozzle can be quickly removed and replaced by a Spearhead nozzle device, the end of which can be thrust through `metal ceilings, metal lath, stucco or other materials which are difficult to penetrate by the usual means employed.
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