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Laying and fine-tuning of subway tracks
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After the track is installed on the ground, how is it put into the subway tunnel?
After the track is assembled, our old friend, the gantry crane, comes to the rescue.
First, the large gantry crane on the ground is used to transfer the prepared track underground.
Then, the small gantry crane in the tunnel is used to place the track on the pre-laid tunnel steel bars.
Then, the workers adjust the height of the track and fix it.
Finally, after the concrete is poured, the overall roadbed of the subway is ready!
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