优选的实施例包括形成螺旋样式的多个进出通道。
A preferred embodiment comprises multiple aspiration passageways formed into a helical pattern.
在进入挖掘坑之前，确认有适当地进出通道并牢记其位置。
Ensure that proper access is provided before entering any excavation and note the position of this access.
一份初步调查表明这些囚犯——与监狱里的工作人员勾结——从监狱员工使用的监狱进出通道逃离。
A preliminary investigation indicated that the inmates — in collusion with prison workers — escaped through the service entrance for vehicles belonging to prison staff members.
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