FIELD: fire-fighting. SUBSTANCE: fixed tube 3 is made in form of through vertical channel in superstructure 2 and hull 1. Tube has immovable platform 7 on its top. Inner tube has thickened flange 6 in its bottom. Supplied to under flange 6 is fire-extinquishing means, e.g., water. EFFECT: higher efficiency. 2 dwg
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