About the fluid power history a. fluid power technology actually began in 1650 with discovery of pascal's law b. in 1926 the united states developed the first unitized, packaged hydraulic system consisting of a pump, valves, fittings and actuators c. in 1906 the battleship uss greenville replaced electrical system into hydraulic system for elevating and controlling the guns d. in 1750, bernoulli developed his law of conservation of work for a fluid flowing in a pipeline