FIELD: machine building.
SUBSTANCE: device consists of hollow cylinder case with thread, end tubular saw, passage for medium and built-in valve. The device is designed for cutting orifice in a pipeline by screwing the case into a shank with internal thread, and also for shutting off leaks from the seat-like head owing to the built-in valve.
EFFECT: extended arsenal of technical means.
10 cl, 20 dwg
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