将差速器向盆形齿轮调整工具处的变速器盖方向压，然后读取百分表上的间隙值。
Press the differential towards the transmission cover at the crown wheel adjusting tool and read off the backlash on the dial gauge.
根据气体状态方程和平衡方程，推导出在某点真空表反映的真空度值与孔压计反映的孔压差的理论关系式。
The theoretical formula about vacuity in vacuum tube and pore-water pressure at the observation point was obtained in this paper by using equation of gas state and equilibrium equation.
在工作时，压差不应该超过压力表的量程值。
Under working conditions the pressure difference should not exceed the full-scale value of the gauge.
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