National Conference on Fluid Power 31st Chicago 1975. National Conference on Fluid Power 31st Chicao 1975 National Conference on Fluid Power,35th,Chicago,1979 Natioanl Conference on Fluid Power,33d,Chicago,1977 National Conference on Fluid Power(Chicago, 1964) National Confereence on Fluid Power 28th 1972. National Confererence on Fluid Power Chicago iii 1971 Natioanal Conference on fluid power,1977 National Conference on Fluid Power National Conference on Fluid Power(41st:1986:Detroit,Michigan)