N
any of various teleost fishes of the genera Nerophis, Syngnathus, etc, having a long tubelike snout and an elongated body covered with bony plates: family Syngnathidae 海龙 (Also called needlefish)
The water flow velocity in thesuctionpipe, whichiscrucial for evaluating the performance on pumping fish, can be measured by the pumped water flow rate of the riser in an air liftpump system.