DRAIN-PIPES COUPLING Russian patent published in 1994 - IPC

Abstract RU 2017886 C1

FIELD: drainage and irrigation. SUBSTANCE: coupling is furnished in its upper part with perforated tubes located in fan manner on outer surface of its body in mutually perpendicular planes. EFFECT: higher efficiency. 2 dwg

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RU 2 017 886 C1

Authors

Kruglov G.G.

Surma N.V.

Dates

1994-08-15—Published

1990-12-17—Filed