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A BACKFLOW PREVENTER, A HOSE COUPLING OF A HYDRANT AND A HYDRANT
A BACKFLOW PREVENTER, A HOSE COUPLING OF A HYDRANT AND A HYDRANT
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机译:防水防止,一种消防栓和消防栓的软管耦合
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摘要
A backflow preventer adapted for installation in an inner conduit of a hose coupling of a hydrant is disclosed. The backflow preventer contains a non-return device having a closing body, a seal seat, and a resetting device. The resetting device is adapted to resiliently pretension the closing body into sealing engagement against the seal seat.
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