题目内容

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

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_____________ 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.

When a continuity viscous fluid flows through a variable section, fluid will lose parts of energy.This can be presented by the pressure loss h_w. The h_w includes two parts: pressure losses along parallel pipes and_________losses.