Take a minute to see how to change sleepers on the railway

Take a minute to see how to change sleepers on the railway 

Take a minute to see how to renew the railway sleepers in China.

There are so many sleepers on the railway, what should we do if can't use it anymore? 

One minute to show you how we change the sleepers on the railway, 

they are Jinggong mechanized troops....

sleeper changer

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