Rescue workers in 8 to start late, as the miners mining rescue channel and escape passage.
救援人员于8月底开始，为矿工挖掘救援通道和逃生通道。
According to the size and height of the falling rock block, the thickness of the circular tube can be determined, which can provide the foundation of designing the escape passage system.
同时，根据岩块大小和下落高度，可以通过计算凹陷变形而确定圆管厚度，为逃生管道的安全设计提供依据。
Besides, the influence of opening cross passage on the locations of escape and rescue sections is given under fire in highway tunnel.
同时研究了横通道开启对人员逃生区域和救援位置的影响。
Boys in my class were digging holes in he classroom to let fresh air in. Then they tried to dig a passage with their bare hands, and finally, I found a way to escape.
班里的男生在房间的废墟中正在努力挖开一些窟窿，让新鲜空气能够透进来，后来，他们又努力地用双手刨出了一个通道，我们终于设法逃了出来。
A needle valve with a threaded spindle is unscrewed to open a passage for the liquid to escape to the reservoir from the cylinder when the jack is required to be lowered.
当千斤顶需要下降时，一个带锭子的针型阀门被放松来使液体通过圆筒流回储备液箱。
A needle valve with a threaded spindle is unscrewed to open a passage for the liquid to escape to the reservoir from the cylinder when the jack is required to be lowered.
当千斤顶需要下降时，一个带锭子的针型阀门被放松来使液体通过圆筒流回储备液箱。
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