求翻译：则巷道、风筒、空气幕和掘进机的壁面设为Trap边界条件；压入式风筒入口，抽出式风筒出口，巷道出口处设为Escape边界条件是什么意思？

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Then the tunnel, the wind tunnel, the air screen and the mechanical boring machine wall surface supposes is the Trap boundary condition; Presses in the type wind tunnel entrance, extracts the type wind tunnel exportation, the tunnel exit supposes is the Escape boundary condition

Roadway, air tube, air curtains and tunnel boring machine of wall boundary condition set to Trap; the press-air duct inlet and exhaust duct outlet, set the exit of the tunnel to Escape the boundary conditions

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