And he said rescuers were debating whether they would in fact need to line the rescue tunnel with metal casing as planned, a process that would take several days.
并且他说营救人员正在辩论他们是否实际需要铺设金属壳的营救管道作为计划，这个过程将花费几天！
The dog chain, the movable end of which is connected with a dog ring by a fastener is connected with the line wheel by a line wheel casing mouth and wound.
活动端用扣具与狗项圈相连的狗链通过线轮壳口与线轮相连并卷绕起来；
The dog chain, the movable end of which is connected with a dog ring by a fastener is connected with the line wheel by a line wheel casing mouth and wound.
活动端用扣具与狗项圈相连的狗链通过线轮壳口与线轮相连并卷绕起来；
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