railroad tie

Wikidata

https://www.wikidata.org/wiki/Q220229

Building the Tianlan railway

Building the Tianlan railway (1952, November)

Pay tribute to the military and civilian workers who cut into mountains to open up roads

Pay tribute to the military and civilian workers who cut into mountains to open up roads (1959, July)

Serve the revolutionary people of the world

Serve the revolutionary people of the world (1971, January)

In industry, learn from Daqing

In industry, learn from Daqing (1976, April)

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