... 股道空闲 track clear 股道占用 track occupied 故障-安全 fail-safe ...
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... 断轨防护;断轨保障broken rail protection;broken rail protection 轨道占用track occupied 分路效应shunting effect ...
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occupied track 占用线路 ; 占有线路
·2,447,543篇论文数据，部分数据来源于NoteExpress
At the same time I was also occupied with trying to get the Northern Ireland peace process back on track.
在这段时间，我还忙于试图使北爱和平进程重新步入正轨。
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