Hydraulic dynamometry rotor was casted from brass alloy.Because of theworking requirement for driving liquid, the laminas of the rotor are assembledslantways and have a complicated structure .

• 水力测功器转子是由黄铜合金铸造而成，由于转子工作时驱动液体的需要，叶片均呈倾斜状，结构比较复杂。