题目内容

The types of hydraulic_________, including: (1)That occurs due to the sudden reduction of the across-section of the orifice or change of the flow direction; (2)That results from the inertia of the high speed working components suddenly braking or changing direction

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The phenomenon of_________happens easily in suction of pump and valve orifice.

_____________ orifice is not sensitivity to temperature, and thus it is usually used as throttle adjustor.

Dynamic viscosity (also known as absolute viscosity) is the measurement of the fluid's internal resistance to flow while_________viscosity refers to the ratio of dynamic viscosity to density

There are three main states of flow, such as laminar,_________and turbulence in a pipe.