Outboard motor pump attachment

作者: Axel L Nielsen

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参考文章(8)
Bickel Forrest F, Bickel Kenneth M, Combination pump and power take-off ,(1948)
Axel L Nielsen, Pump and propulsion unit ,(1952)
James A Mcintosh, Outboard motor pump ,(1955)
Christopher J Meyer, Portable pump and motor unit ,(1922)
Ferdinand W Krogh, Construction of centrifugal pumps. ,(1906)
Le Roy H Labaw, Motor pump unit ,(1928)