Certificate on the award of the "Best Wastewater treatment slaughtering" of Semenov Y.F.
According to the results of the social competition in the second half of 1973. Two signatures and two seals.
Creation time: 1973 y.
Share:According to the results of the social competition in the second half of 1973. Two signatures and two seals.
Creation time: 1973 y.
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