这两种内啮合齿轮泵的工作原理和外啮合齿轮泵的工作原理相同。
These two kinds of internal gear pump working principle and external gear pump working principle the same.
燃油泵(卸油泵，高粘度泵，沥青泵)齿轮的磨损部位主要是齿的啮合、渐开线工作面和齿轮两端平面。
Fuel pump (unloading pump, high viscosity pump, asphalt pump) gear wear and tear parts mainly is the tooth meshing, involute face and gear ends plane.
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