tongs

Push and release the tongs, don't back down, so as not to hit people

Push and release the tongs, don't back down, so as not to hit people (early 1950s)

The position of the tongs should be upright

The position of the tongs should be upright (early 1950s)

Our cause is just, the just cause has to be victorious!

Our cause is just, the just cause has to be victorious! (ca. 1967)

Industry studies Daqing

Industry studies Daqing (1971)

I donate oil to the nation

I donate oil to the nation (1976, April)

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