track circuit permissive block的意思|示意
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英 / /
轨道电路允许阻塞
track circuit permissive block的网络常见释义
有轨道电路的容许闭塞 ... MARBLE TRACK BUILDING BLOCK 弹珠轨道积木 track circuit permissive block 有轨道电路的容许闭塞 track block assembly 履带块总成 ...