... 新线运营 New line operation 旧线改造 existing line reformation 线路改造 track remodelling ...
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简要阐述了我国铸造机械化的现状和旧线改造的需要。
The present status of China foundry mechanization and the need for old production - line reform are summarized.
在旧线改造或新建的地方专用铁路施工中，由于铺轨量不大，以往大多采用手工作业方式。
In the rehabilitation of old railroad line and the construction of local special railways, track-laying is usually done manually due to the limited amount of work.
近年来，我国地铁的新线建设或旧线改造工程广泛采用在站台边缘设置站台屏蔽门，将隧道与车站分隔开以确保运营安全。
In recent years, PSD is widely used to ensure operational safety by separating the tunnel and the station on the edge of the platform in constructing a new subway line or renewing the old line.
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