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.
国家除对铁路实行统一管理、集中指挥外，每年都投入大量资金修建铁路，在修建新线的同时，还对旧线进行了改造。
The nation makes railways under centralization of management and control and invests much money in building new railway lines and rebuilding the old railway lines every year.
简要叙述了南屯煤矿将旧铁路装车线改造为自动添加系统，介绍了该系统的原理、构成等。
This paper narrates how Hantun coal mine transforms the old railway load line into automatic loading system and introduces the principle and structure of this system.
除继续修建新的高速线外，更多的是利用改造旧线和摆式车体列车实现高速旅客运输。
Besides building new high speed lines, the high speed passenger transport is realized more often by reforming old lines and applying tilting trains.
本文介绍了国道220线朱场桥旧桥改造设计方案及施工措施。
This paper introduced Zhuchang Bridge renewal design project and construction method of national road No. 220.
针对目前大多数煤矿装车线存在的问题，就国内煤矿装车线添加系统现状，将煤矿旧装车线改造为自动添加系统。
Aiming at existing problem in most loading line of coal mine and current status of adding system of loading line in domestic coal mine, an old loading line is reformed to a automatic adding system.
针对目前大多数煤矿装车线存在的问题，就国内煤矿装车线添加系统现状，将煤矿旧装车线改造为自动添加系统。
Aiming at existing problem in most loading line of coal mine and current status of adding system of loading line in domestic coal mine, an old loading line is reformed to a automatic adding system.
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